Documentation: update README in line with v6.5.0

* README.md (english)
* README.md (german)
* correction the relative path selection

Signed-off-by: Ralf Zerres <ralf.zerres@networkx.de>

README.md

@@ -5,8 +5,8 @@
 
 <p align="center">
   <span>English</span> |
-  <!-- a href="lang/spanish#dsnap-sync">Spanish</a> | -->
+  <!-- a href="lang/spanish">Spanish</a> | -->
-  <a href="lang/german#dsnap-sync">Deutsch</a>
+  <a href="lang/german">Deutsch</a>
 </p>
 
 ## About
@@ -140,17 +140,17 @@ Following tools are used:
 `dsnap-sync` is a shell script. Thus no compilation is required.
 To simplify correct target locations, this project uses a Makefile.
 
-    # make install
+	# make install
 
 If your system uses a non-default location for the snapper
 configuration defaults, specify the location with an environment variable
 (`SNAPPER_CONFIG`).
 
-    Arch Linux/Fedora/Gentoo:
+	Arch Linux/Fedora/Gentoo:
-    # make SNAPPER_CONFIG=/etc/conf.d/snapper install
+	# make SNAPPER_CONFIG=/etc/conf.d/snapper install
 
-    Debian/Ubuntu:
+	Debian/Ubuntu:
-    # make SNAPPER_CONFIG=/etc/default/snapper install
+	# make SNAPPER_CONFIG=/etc/default/snapper install
 
 The local `snapper` configuration will be extended to make use
 of a new template 'dsnap-sync'.
@@ -172,41 +172,41 @@ Please use your host software package manager.
 
 ## Options
 
-    Usage: dsnap-sync [options]
+	Usage: dsnap-sync [options]
 
-      Options:
+	  Options:
-      -a, --automount <path>      start automount for given path to get a valid target mountpoint.
+	  -a, --automount <path>      start automount for given path to get a valid target mountpoint.
-      -b, --backupdir <prefix>    backupdir is a relative path that will be appended to target backup-root
+	  -b, --backupdir <prefix>    backupdir is a relative path that will be appended to target backup-root
-          --backuptype <type>     Specify backup type <archive | child | parent>
+		  --backuptype <type>     Specify backup type <archive | child | parent>
-	      --batch                 no user interaction
+		  --batch                 no user interaction
-      -d, --description <desc>    Change the snapper description. Default: "latest incremental backup"
+	  -d, --description <desc>    Change the snapper description. Default: "latest incremental backup"
-          --label-finished <desc> snapper description tagging successful jobs. Default: "dsnap-sync backup"
+		  --label-finished <desc> snapper description tagging successful jobs. Default: "dsnap-sync backup"
-          --label-running <desc>  snapper description tagging active jobs. Default: "dsnap-sync in progress"
+		  --label-running <desc>  snapper description tagging active jobs. Default: "dsnap-sync in progress"
-          --label-synced <desc>   snapper description tagging last synced jobs.
+		  --label-synced <desc>   snapper description tagging last synced jobs.
-                                  Default: "dsnap-sync last incremental"
+								  Default: "dsnap-sync last incremental"
-          --color                 Enable colored output messages
+		  --color                 Enable colored output messages
-      -c, --config <config>       Specify the snapper configuration to use. Otherwise will perform for each snapper
+	  -c, --config <config>       Specify the snapper configuration to use. Otherwise will perform for each snapper
-                                  configuration. You can select multiple configurations
+								  configuration. You can select multiple configurations
-                                  (e.g. -c "root" -c "home"; --config root --config home)
+								  (e.g. -c "root" -c "home"; --config root --config home)
-          --config-postfix <name> Specify a postfix that will be appended to the destination snapper config name.
+		  --config-postfix <name> Specify a postfix that will be appended to the destination snapper config name.
-          --dry-run               perform a trial run (no changes are written).
+		  --dry-run               perform a trial run (no changes are written).
-          --mediapool             Specify the name of the tape MediaPool
+		  --mediapool             Specify the name of the tape MediaPool
-      -n, --noconfirm             Do not ask for confirmation for each configuration. Will still prompt for backup
+	  -n, --noconfirm             Do not ask for confirmation for each configuration. Will still prompt for backup
-          --nonotify              Disable graphical notification (via dbus)
+		  --nonotify              Disable graphical notification (via dbus)
-          --nopv                  Disable graphical progress output (disable pv)
+		  --nopv                  Disable graphical progress output (disable pv)
-          --noionice              Disable setting of I/O class and priority options on target
+		  --noionice              Disable setting of I/O class and priority options on target
-      -r, --remote <address>      Send the snapshot backup to a remote machine. The snapshot will be sent via ssh
+	  -r, --remote <address>      Send the snapshot backup to a remote machine. The snapshot will be sent via ssh
-                                  You should specify the remote machine's hostname or ip address. The 'root' user
+								  You should specify the remote machine's hostname or ip address. The 'root' user
-                                  must be permitted to login on the remote machine
+								  must be permitted to login on the remote machine
-      -p, --port <port>           The remote port
+	  -p, --port <port>           The remote port
-      -s, --subvolid <subvlid>    Specify the subvolume id of the mounted BTRFS subvolume to back up to. Defaults to 5.
+	  -s, --subvolid <subvlid>    Specify the subvolume id of the mounted BTRFS subvolume to back up to. Defaults to 5.
-	      --use-btrfs-quota       use btrfs-quota to calculate snapshot size
+		  --use-btrfs-quota       use btrfs-quota to calculate snapshot size
-      -u, --uuid <UUID>           Specify the UUID of the mounted BTRFS subvolume to back up to. Otherwise will prompt
+	  -u, --uuid <UUID>           Specify the UUID of the mounted BTRFS subvolume to back up to. Otherwise will prompt
-                                  If multiple mount points are found with the same UUID, will prompt for user selection
+								  If multiple mount points are found with the same UUID, will prompt for user selection
-      -t, --target <target>       Specify the mountpoint of the backup device
+	  -t, --target <target>       Specify the mountpoint of the backup device
-          --volumename            Specify the name of the tape volume
+		  --volumename            Specify the name of the tape volume
-      -v, --verbose               Be verbose on what's going on (min: --verbose=1, max: --verbose=3)
+	  -v, --verbose               Be verbose on what's going on (min: --verbose=1, max: --verbose=3)
-          --version		          show program version
+		  --version		show program version
 
 ## First run
 
@@ -259,7 +259,7 @@ backup types are differenciated:
   * create a config specific subdirectory (`archive-<config-name>`)
   * create a snapshot-id subdirectory (`<snapper-id>`)
   * create the btrfs stream file inside the subdirectory
-      (`<snapper-id>_[full | incremental].btrfs`)
+	  (`<snapper-id>_[full | incremental].btrfs`)
   * the proccess metadata are saved to a file called `info.xml`
 
   If you enabled the `ltfs` package, support for backups to tape is possible.
@@ -304,6 +304,34 @@ FUSE). Read and write access can be managed using common OS tools.
 An open-source implementation can be found at
 [LinearTapeFileSystem](https://github.com/LinearTapeFileSystem/ltfs).
 
+## Restore
+
+### From Tape
+
+When `dsnap-sync` did save the data with method `btrfs-archive`, you will find
+the corresponding data in a snapper compatible directory structure on the tape.
+
+The structure may look like:
+
+ └── backups
+	 └── @<server-name>
+		├── archive-<subvol-name>
+		│   └── <subvol-id>
+		│       ├── <subvol-id>_full.btrfs
+		│       └── info.xml
+
+The file `info.xml` provide the metadata corresponding to the snapshot.
+The data of the snapshot is stored in the file `<subvol-id>_full.btrfs`.
+This file has to be decrypted with btrfs tool `btrfs-send` to a btrfs
+restore directory:
+
+  cd /target_btrfs_path
+  cp /path_to_tape_root/backups/@<server-name>/archive-<subvol-name>/<subvol-id>_full.btrfs .
+  cat <subvol-id>_full.btrfs  | btrfs receive -v  .
+  rm <subvol-id>_full.btrfs
+
+Please consult btrfs-send man-page for further info.
+
 ## Contributing
 
 Help is very welcome! Feel free to fork and issue a pull request to add
@@ -331,4 +359,4 @@ This work is licensed under a [Creative Common License 4.0][License-CC_BY]
 ![Creative Common Logo][Logo-CC_BY]
 
 © 2016, 2017  James W. Barnett;
-© 2017 - 2018 Ralf Zerres
+© 2017 - 2019 Ralf Zerres

bin/dsnap-sync

@@ -27,7 +27,7 @@
 # difference for the next incremental snapshot.
 
 progname="${0##*/}"
-version="0.6.5"
+version="0.6.5.1"
 
 # The following lines are modified by the Makefile or
 # find_snapper_config script
@@ -79,6 +79,7 @@ snapper_backup_type='none'
 #snapper_config_postfix="."`hostname`
 snapper_config_postfix=
 snap_cleanup_algorithm="timeline"
+transfer_size=0
 verbose=0
 volume_name=
 
@@ -133,7 +134,7 @@ check_snapper_failed_ids () {
 			     | awk '/'"$snap_description_running"'/ {cnt++} END {print cnt}')
     #snapper_failed_ids="snapper --config $selected_config list --type single \
     #	    | awk '/'"$snap_description_running"'/' \
-    # 	    | awk ' /'host='"$remote"'/ {cnt++} END {print cnt}'"
+    #	    | awk ' /'host='"$remote"'/ {cnt++} END {print cnt}'"
 
     if [ ${#snapper_failed_ids} -gt 0 ]; then
 	if [ "$batch" ]; then
@@ -161,6 +162,103 @@ check_snapper_failed_ids () {
     fi
 }
 
+check_transfer_size () {
+    local source_snapshot=${1##source_snapshot=}
+    local clone_snapshot=${2##clone_snapshot=}
+
+    if [ $verbose -ge 3 ]; then
+	printf "${MAGENTA}check_transfer_size()...${NO_COLOR}\n"
+    fi
+
+    if [ $dryrun -eq 0 ]; then
+	transfer_size=0
+	if [ "$interactive" -eq 1 ]; then
+	    if [ $verbose -ge 2 ]; then
+		if [ ${#clone_snapshot} -gt 0 ]; then
+		    printf "${MAGENTA}Calculate transfer size for incremental snapshot (clone=${GREEN}'%s'${MAGENTA}, source=${GREEN}'%s'${MAGENTA})${NO_COLOR} ...\n" \
+			   "$clone_snapshot" "$source_snapshot"
+		else
+		    printf "${MAGENTA}Calculate transfer size for snapshot (source=${GREEN}'%s'${MAGENTA})${NO_COLOR} ...\n" \
+			   "$ssource_snapshot"
+		fi
+	    fi
+	    if [ $btrfs_quota -eq 1 ]; then
+		# qgroup for given path, exclude ancestrals
+		# qgroup identifiers conform to level/id where level 0 is reserved to the qgroups associated with subvolumes
+		transfer_size=$(btrfs qgroup show -f --raw $source_snapshot 2>/dev/null \
+						   | awk 'FNR>2 {print $2}')
+		if [ $? -eq 1 ]; then
+		    # subvolume is not configured for quota, (temporary?, expensive?) enable that
+		    if [ $btrfs_quota_tmp -eq 1 ]; then
+			btrfs quota enable $source_snapshot 2>/dev/null
+			btrfs quota rescan -w $source_snapshot 2>/dev/null
+			transfer_size=$(btrfs qgroup show -f --raw $source_snapshot 2>/dev/null \
+					    | awk 'FNR>2 {print $2}')
+		    fi
+		fi
+
+		if [ $verbose -ge 3 ]; then
+		    printf "${MAGENTA}BTRFS qgroup show result: ${GREEN}'%s'\b${NO_COLOR}'%s'\n" \
+			   "$?" "$transfer_size"
+		fi
+
+		# need to substitue btrfs 'x.yyGiB' suffix, since pv will need 'xG'
+		if [ $transfer_size -ge 1048576 ]; then
+		    transfer_size=$(btrfs qgroup show -f --gbytes $source_snapshot 2>/dev/null \
+						       | awk 'FNR>2 { gsub(/.[0-9][0-9]GiB/,"G"); print $2}')
+		fi
+		if [ $verbose -ge 2 ]; then
+		    printf "${MAGENTA}BTRFS quota size for ${GREEN}source snapshot${MAGENTA}: size=${GREEN}'%s'${NO_COLOR} ...\n" \
+			   "$snapper_source_id" "$transfer_size"
+		fi
+
+		# should we disable quota usage again?
+		if [ $btrfs_quota_tmp -eq 1 ]; then btrfs quota disable $source_snapshot; fi
+	    else
+		if [ ${#clone_snapshot} -gt 0 ]; then
+		    # WIP: dry run with btrfs send
+		    # need to substitue btrfs 'x.yyGiB' suffix, since pv will need 'xG'
+		    transfer_size=$(btrfs send -v -p $clone_snapshot $source_snapshot 2>$BTRFS_PIPE \
+					| pv -f 2>&1 >/dev/null \
+					| awk -F ' ' '{ gsub(/.[0-9][0-9]MiB/,"M"); gsub(/.[0-9][0-9]GiB/,"G"); print $1 }' )
+		else
+		    # filesystem size
+		    transfer_size=$(du --one-file-system --summarize $snapper_source_snapshot 2>/dev/null \
+					| awk -F ' ' '{print $1}')
+		    if [ $transfer_size -ge 1048576 ]; then
+			transfer_size=$(($transfer_size / 1024 / 1024))G
+		    fi
+		fi
+		if [ $verbose -ge 2 ]; then
+		    printf "${MAGENTA}BTRFS transfer size for ${GREEN}source snapshot${MAGENTA}: size=${GREEN}'%s'${NO_COLOR} ...\n" \
+			   "$transfer_size"
+		fi
+	    fi
+	fi
+    else
+	if [ $verbose -ge 2 ]; then
+	    printf "${MAGENTA}dryrun: Would calculate transfer size for BTRFS ${GREEN}source snapshot${NO_COLOR} ...\n" \
+		   "$snapper_source_id"
+	fi
+    fi
+
+}
+
+create_pv_cmd () {
+    if [ $verbose -ge 3 ]; then
+	printf "${MAGENTA}create_pv_cmd()...${NO_COLOR}\n"
+    fi
+
+    # prepare cmdline output settings for interactive progress status
+    if [ $do_pv_cmd -eq 1 ]; then
+	pv_options="--delay-start 2  --interval 5 --format \"time elapsed [%t] | avg rate %a | rate %r | transmitted [%b] | %p | time remaining [%e]\" "
+	cmd_pv="pv --size $transfer_size $pv_options | "
+	#cmd_pv="pv $pv_options --size ${transfer_size} | dialog --gauge \"$progname: Progress for config '$selected_config'\" 6 85 |"
+    else
+	cmd_pv=''
+    fi
+}
+
 create_snapshot () {
     if [ $verbose -ge 3 ]; then
 	printf "${MAGENTA}create_snapshot()...${NO_COLOR}\n" $snapper_config
@@ -278,12 +376,12 @@ get_archive_last_sync_id () {
 	case ${archive_type} in
 	    #incremental)
 	    #	cmd="find ${selected_target}/${backupdir}/${snapper_target_config} -name *_${archive_type}.btrfs \
-    	    #  	    | awk -F '.*/'  '{ gsub(/_${archive_type}.btrfs\$/,"_"); print \$2}' \
+	    #	    | awk -F '.*/'  '{ gsub(/_${archive_type}.btrfs\$/,"_"); print \$2}' \
 	    #       | awk ' \$1 == $snapper_source_sync_id {print \$1} ' "
 	    #	;;
 	    *)
-	        cmd="find ${selected_target}/${backupdir}/${snapper_target_config} -name *_${archive_type}.btrfs \
+		cmd="find ${selected_target}/${backupdir}/${snapper_target_config} -name *_${archive_type}.btrfs \
-    	       	    | awk -F '.*/'  '{ gsub(/_${archive_type}.btrfs\$/,"_"); cnt++} END {print cnt}'"
+		    | awk -F '.*/'  '{ gsub(/_${archive_type}.btrfs\$/,"_"); cnt++} END {print cnt}'"
 		ret=$(eval $run_ssh "$cmd" 2>/dev/null)
 		if [ ${#ret} -ge 1 ]; then
 		    if [ $verbose -ge 3 ]; then
@@ -292,7 +390,7 @@ get_archive_last_sync_id () {
 		    fi
 		    # get last sync-id
 		    cmd="find ${selected_target}/${backupdir}/${snapper_target_config} -name *_${archive_type}.btrfs \
-    	       	    	      | awk -F '.*/'  '{ gsub(/_${archive_type}.btrfs\$/,"_") } END {print \$2}'"
+			      | awk -F '.*/'  '{ gsub(/_${archive_type}.btrfs\$/,"_") } END {print \$2}'"
 		else
 		    return 1
 		fi
@@ -565,7 +663,7 @@ get_disk_infos () {
 	    # local root filesystem will be excluded as a valid target location
 	    exclude_uuid=$(findmnt --noheadings --nofsroot --mountpoint / --output UUID)
 	    disk_uuids=$(findmnt --noheadings --nofsroot --types btrfs --output UUID,TARGET --list \
-	    		 | grep -v $exclude_uuid \
+			 | grep -v $exclude_uuid \
 			 | awk '{print $1}')
 	    disk_targets=$(findmnt --noheadings --nofsroot --types btrfs --output UUID,TARGET --list \
 			   | grep -v $exclude_uuid \
@@ -579,7 +677,7 @@ get_disk_infos () {
 	    exclude_uuid=$($ssh findmnt --noheadings --nofsroot --mountpoint / --output UUID)
 	    sleep 0.2
 	    disk_uuids=$($ssh "findmnt --noheadings --nofsroot --types btrfs --output UUID,TARGET --list \
-	    		 | grep -v \"$exclude_uuid\" \
+			 | grep -v \"$exclude_uuid\" \
 			 | awk '{print \$1}'")
 	    sleep 0.2
 	    disk_targets=$($ssh "findmnt --noheadings --nofsroot --types btrfs --output UUID,TARGET --list \
@@ -589,7 +687,7 @@ get_disk_infos () {
 	    fs_options=$($ssh "findmnt --noheadings --nofsroot --types btrfs --output UUID,OPTIONS --list \
 			 | grep -v \"$exclude_uuid\" \
 			 | awk '{print \$2}'")
-        fi
+	fi
     else
 	# target location is not mounted as root subvolume
 	sleep 0.2
@@ -781,13 +879,13 @@ get_snapper_last_sync_id () {
 	fi
     fi
     if [ ${#snapper_subvolid} -ge 1 -a ${#snapper_uuid} -ge 1 ]; then
-    	cmd="snapper --config $snapper_config list --type single \
+	cmd="snapper --config $snapper_config list --type single \
 	     | awk '/$snapper_description/' \
 	     | awk '/subvolid="$snapper_subvolid", uuid="$snapper_uuid"/' \
 	     | awk 'END {print \$1}'"
     elif [ ${#snapper_tapeid} -ge 1 ]; then
 	# | awk '/"$snapper_description"' '/"$snap_description_finished/"'  \
-    	cmd="snapper --config $snapper_config list --type single \
+	cmd="snapper --config $snapper_config list --type single \
 	     | awk '/$snapper_description/' \
 	     | awk '/tapeid="$snapper_tapeid"/' \
 	     | awk 'END {print \$1}'"
@@ -810,17 +908,17 @@ get_snapper_last_sync_id () {
 	# no snapshot found, grap latest successfull sync
 	if [ ${#snapper_subvolid} -ge 1 -a ${#snapper_uuid} -ge 1 ]; then
 	    cmd="snapper --config $snapper_config list --type single \
-	    	| awk '/$snap_description_finished/' \
+		| awk '/$snap_description_finished/' \
-	    	| awk '/subvolid="$selected_subvol", uuid="$selected_uuid"/' \
+		| awk '/subvolid="$selected_subvol", uuid="$selected_uuid"/' \
 		| awk 'END {print \$1}'"
 	elif [ ${#snapper_tapeid} -ge 1 ]; then
-    	    cmd="snapper --config $snapper_config list --type single \
+	    cmd="snapper --config $snapper_config list --type single \
 	     | awk '/$snap_description_finished/' \
 	     | awk '/tapeid="$snapper_tapeid"/' \
 	     | awk 'END {print \$1}'"
 	else
 	    cmd="snapper --config $snapper_config list --type single \
-	    	 | awk '/$snap_description_finished/' \
+		 | awk '/$snap_description_finished/' \
 		 | awk 'END {print \$1}'"
 	fi
 	snapper_sync_id=$(eval $run_ssh "$cmd")
@@ -857,7 +955,7 @@ get_snapper_sync_id () {
     [ ${#remote} -gt 0 ] && run_ssh=$ssh
 
     cmd="snapper --config "$snapper_config" list --type single \
-    	 | awk -F '|' ' \$1 == $snapper_sync_id { gsub(/ /,_); print \$1} '"
+	 | awk -F '|' ' \$1 == $snapper_sync_id { gsub(/ /,_); print \$1} '"
 
     ret=$(eval $run_ssh "$cmd")
     if [ ${#ret} -ge 1 ]; then
@@ -1193,7 +1291,7 @@ parse_params () {
 	else
 	    $ssh which sh >/dev/null 2>&1 || \
 	    { printf "'remote shell' is not working!\n \
-	          Please correct your public authentication and try again.\n" && exit 1; }
+		  Please correct your public authentication and try again.\n" && exit 1; }
 	fi
     fi
 
@@ -1406,12 +1504,12 @@ run_config_preparation () {
 			# get backupdir from snapper target
 			get_snapper_target_backupdir $backupdir
 			if [ $verbose -ge 3 ]; then
-		    		if [ $remote ]; then
+				if [ $remote ]; then
 					printf "${MAGENTA}backupdir on remote '%s': ${GREEN}'%s'${NO_COLOR}\n" \
-			       		       "$remote" "$backupdir"
+					       "$remote" "$backupdir"
 				else
 					printf "${MAGENTA}backupdir: ${GREEN}'%s'${NO_COLOR}\n" \
-			       		       "$backupdir"
+					       "$backupdir"
 				fi
 			fi
 			# set target sync_snapshot path
@@ -1428,13 +1526,13 @@ run_config_preparation () {
 			    snapper_target_sync_snapshot=$backup_root/.snapshots/$snapper_target_sync_id/$snapper_snapshot_name
 			fi
 			if [ $verbose -ge 3 ]; then
-		    		if [ $remote ]; then
+				if [ $remote ]; then
 					printf "${MAGENTA}backup_root on remote '%s': ${GREEN}'%s'${NO_COLOR}\n" \
-			       		"$remote" "$backup_root"
+					"$remote" "$backup_root"
-		    		else
+				else
 					printf "${MAGENTA}backup_root: ${GREEN}'%s'${NO_COLOR}\n" \
-			       		"$backup_root"
+					"$backup_root"
-		    		fi
+				fi
 			fi
 			;;
 		    *)
@@ -1539,15 +1637,15 @@ run_backup () {
 
 	if [ $verbose -ge 3 ]; then
 	    printf "${MAGENTA}snapper_source_config: ${GREEN}'%s'${NO_COLOR}\n" \
-	    	   "$snapper_source_config"
+		   "$snapper_source_config"
 	    printf "${MAGENTA}snapper_target_config: ${GREEN}'%s'${NO_COLOR}\n" \
-	    	   "$snapper_target_config"
+		   "$snapper_target_config"
 	    printf "${MAGENTA}snapper_backup_type: ${GREEN}'%s'${NO_COLOR}\n" \
 		   "$snapper_backup_type"
 	    printf "${MAGENTA}snapper_source_sync_id: ${GREEN}'%s'${NO_COLOR}\n" \
-	    	   "$snapper_source_sync_id"
+		   "$snapper_source_sync_id"
 	    printf "${MAGENTA}snapper_common_sync_id: ${GREEN}'%s'${NO_COLOR}\n" \
-	    	   "$snapper_common_sync_id"
+		   "$snapper_common_sync_id"
 	    printf "${MAGENTA}backup_dir: ${GREEN}'%s'${NO_COLOR}\n" "$backup_dir"
 	    printf "${MAGENTA}backup_root: ${GREEN}'%s'${NO_COLOR}\n" "$backup_root"
 	fi
@@ -1616,64 +1714,6 @@ run_backup () {
 	    continue
 	fi
 
-	if [ $dryrun -eq 0 ]; then
-	    snapper_source_snapshot_size=0
-	    if [ "$interactive" -eq 1 ]; then
-		if [ $verbose -ge 2 ]; then
-		    printf "${MAGENTA}Get size for given source snapshot (id=${GREEN}'%s'${MAGENTA}, path=${GREEN}'%s'${MAGENTA})${NO_COLOR} ...\n" \
-			   "$snapper_source_id" "$snapper_source_snapshot"
-		fi
-
-		if [ $btrfs_quota -eq 1 ]; then
-		    # qgroup for given path, exclude ancestrals
-		    # qgroup identifiers conform to level/id where level 0 is reserved to the qgroups associated with subvolumes
-		    snapper_source_snapshot_size=$(btrfs qgroup show -f --raw $snapper_source_snapshot 2>/dev/null \
-						       | awk 'FNR>2 {print $2}')
-                    if [ $? -eq 1 ]; then
-                        # subvolume is not configured for quota, (temporary?) enable that
-                        if [ $btrfs_quota_tmp -eq 1 ]; then
-                            btrfs quota enable $snapper_source_snapshot 2>/dev/null
-                            btrfs quota rescan -w $snapper_source_snapshot 2>/dev/null
-                            snapper_source_snapshot_size=$(btrfs qgroup show -f --raw $snapper_source_snapshot 2>/dev/null \
-                                                               | awk 'FNR>2 {print $2}')
-			fi
-		    fi
-
-		    if [ $verbose -ge 3 ]; then
-			printf "${MAGENTA}BTRFS qgroup show result: ${GREEN}'%s'\b${NO_COLOR}'%s'\n" \
-	    		       "$?" "$snapper_source_snapshot_size"
-		    fi
-
-		    # need to substitue btrfs 'x.yyGiB' suffix, since pv will need 'xG'
-		    if [ $snapper_source_snapshot_size -ge 1048576 ]; then
-			snapper_source_snapshot_size=$(btrfs qgroup show -f --gbytes $snapper_source_snapshot 2>/dev/null \
-							   | awk 'FNR>2 { gsub(/.[0-9][0-9]GiB/,"G"); print $2}')
-		    fi
-		    if [ $verbose -ge 2 ]; then
-			printf "${MAGENTA}BTRFS quota size for ${GREEN}source snapshot${MAGENTA}: id=${GREEN}'%s'${MAGENTA}, size=${GREEN}'%s'${NO_COLOR} ...\n" \
-			       "$snapper_source_id" "$snapper_source_snapshot_size"
-		    fi
-
-		    # should we disable quota usage again?
-		    if [ $btrfs_quota_tmp -eq 1 ]; then btrfs quota disable $snapper_source_snapshot; fi
-		else
-		    snapper_source_snapshot_size=$(du --one-file-system --summarize $snapper_source_snapshot 2>/dev/null \
-						       | awk -F ' ' '{print $1}')
-		    if [ $snapper_source_snapshot_size -ge 1048576 ]; then
-			snapper_source_snapshot_size=$(($snapper_source_snapshot_size / 1024 / 1024))G
-		    fi
-		    if [ $verbose -ge 2 ]; then
-			printf "${MAGENTA}BTRFS subvolume size for ${GREEN}source snapshot${MAGENTA}: id=${GREEN}'%s'${MAGENTA}, size=${GREEN}'%s'${NO_COLOR} ...\n" \
-			       "$snapper_source_id" "$snapper_source_snapshot_size"
-		    fi
-		fi
-	    fi
-	else
-	    if [ $verbose -ge 2 ]; then
-		printf "${MAGENTA}dryrun: Would calculate BTRFS subvolume size for ${GREEN}source snapshot${NO_COLOR} ...\n" \
-		       "$snapper_source_id"
-	    fi
-	fi
 	# setting process I/O scheduling options
 	if [ $do_ionice_cmd -eq 1 ]; then
 	    # class: best-efford, priority: medium
@@ -1684,59 +1724,58 @@ run_backup () {
 	    cmd_ionice=''
 	fi
 
-	# settings for interactive progress status
+	# prepare pipe command
-	if [ $do_pv_cmd -eq 1 ]; then
-	    pv_options="--delay-start 2  --interval 5 --format \"time elapsed [%t] | avg rate %a | rate %r | transmitted [%b] | %p | time remaining [%e]\" "
-	    cmd_pv="pv --size $snapper_source_snapshot_size $pv_options | "
-	    #cmd_pv="pv $pv_options --size ${snapper_source_snapshot_size} | dialog --gauge \"$progname: Progress for config '$selected_config'\" 6 85 |"
-	else
-	    cmd_pv=''
-	fi
-
-	case $selected_fstype in
-	     btrfs)
-		 cmd="btrfs send $btrfs_verbose_flag $snapper_source_snapshot 2>$BTRFS_PIPE \
-		     | $cmd_pv \
-		     $cmd_ionice $ssh btrfs receive $btrfs_verbose_flag $snapper_target_snapshot/ 1>$BTRFS_PIPE 2>&1"
-		 ;;
-	     *)
-		 # Can't use btrfs receive, since target filesystem can't support btrfs snapshot feature
-		 snapper_target_stream=${snapper_target_id}_${archive_type}.btrfs
-		 if [ ! -f $snapper_target_snapshot/$snapper_target_stream ]; then
-		     if [ -z $remote ]; then
-			 cmd="btrfs send $btrfs_verbose_flag $snapper_source_snapshot 2>/dev/null \
-		     	     | $cmd_pv \
-			     $cmd_ionice cat > $snapper_target_snapshot/$snapper_target_stream"
-		     else
-			 cmd="btrfs send $btrfs_verbose_flag $snapper_source_snapshot 2>/dev/null \
-		     	     | $cmd_pv \
-			     $cmd_ionice $ssh 'cat > $snapper_target_snapshot/$snapper_target_stream' 2>$BTRFS_PIPE"
-		     fi
-		 else
-		     if [ $verbose -ge 2 ]; then
-			 printf "${RED}BTRFS_Stream: %s${NO_COLOR} already saved.\n" \
-				"$snapper_target_snapshot/$snapper_target_stream"
-		     fi
-		     # go for next configuration
-		     i=$(($i+1))
-		     continue
-		 fi
-		 ;;
-	esac
 	if [ "$dryrun" -eq 0 ]; then
 	    if [ "$snapper_source_sync_id" -eq 0 ] \
 		   || [ "$snapper_target_sync_id" -eq 0 ] \
 		   || [ "$backup_mode" = "full" ] ; then
+
+		# get size of stream that needs to be transfered
+		check_transfer_size "source_snapshot=$snapper_source_snapshot"
+
+		# prepare send pipe command
+		create_pv_cmd
+		case $selected_fstype in
+		    btrfs)
+			cmd="btrfs send $btrfs_verbose_flag $snapper_source_snapshot 2>$BTRFS_PIPE \
+		     | $cmd_pv \
+		     $cmd_ionice $ssh btrfs receive $btrfs_verbose_flag $snapper_target_snapshot/ 1>$BTRFS_PIPE 2>&1"
+			;;
+		    *)
+			# Can't use btrfs receive, since target filesystem can't support btrfs snapshot feature
+			snapper_target_stream=${snapper_target_id}_${archive_type}.btrfs
+			if [ ! -f $snapper_target_snapshot/$snapper_target_stream ]; then
+			    if [ -z $remote ]; then
+				cmd="btrfs send $btrfs_verbose_flag $snapper_source_snapshot 2>/dev/null \
+			     | $cmd_pv \
+			     $cmd_ionice cat > $snapper_target_snapshot/$snapper_target_stream"
+			    else
+				cmd="btrfs send $btrfs_verbose_flag $snapper_source_snapshot 2>/dev/null \
+			     | $cmd_pv \
+			     $cmd_ionice $ssh 'cat > $snapper_target_snapshot/$snapper_target_stream' 2>$BTRFS_PIPE"
+			    fi
+			else
+			    if [ $verbose -ge 2 ]; then
+				printf "${RED}BTRFS_Stream: %s${NO_COLOR} already saved.\n" \
+				       "$snapper_target_snapshot/$snapper_target_stream"
+			    fi
+			    # go for next configuration
+			    i=$(($i+1))
+			    continue
+			fi
+			;;
+		esac
+
 		# send full snapshot to target
 		if [ $verbose -ge 2 ]; then
-		    if [ ${#snapper_source_snapshot_size} -gt 0 ]; then
+		    if [ ${#transfer_size} -gt 0 ]; then
 			printf "${MAGENTA}Sending ${GREEN}snapshot${NO_COLOR} for snapper config ${GREEN}'%s' ${MAGENTA}(id='%s', size='%s')${NO_COLOR} ...\n" \
-			       "$selected_config" "$snapper_source_id" "$snapper_source_snapshot_size"
+			       "$selected_config" "$snapper_source_id" "$transfer_size"
 		    else
 			printf "${MAGENTA}Sending ${GREEN}snapshot${NO_COLOR} for snapper config ${GREEN}'%s' ${MAGENTA}(id='%s')${NO_COLOR} ...\n" \
 			       "$selected_config"
 		    fi
-	        fi
+		fi
 		# the actual data sync to the target
 		# this may take a while, depending on datasize and line-speed
 		if [ $verbose -ge 3 ]; then
@@ -1751,8 +1790,8 @@ run_backup () {
 		    continue
 		fi
 	    else
-	        # source holds synced snapshots
+		# source holds synced snapshots
-	        if [ $verbose -ge 3 ]; then
+		if [ $verbose -ge 3 ]; then
 		    printf "New ${GREEN}source${NO_COLOR} snapshot id: ${GREEN}'%s'${NO_COLOR} (path: ${GREEN}'%s'${NO_COLOR})\n" \
 			   "$snapper_source_id" "$snapper_source_snapshot"
 		    printf "New ${GREEN}target${NO_COLOR} snapshot id: ${GREEN}'%s'${NO_COLOR} (path: ${GREEN}'%s'${NO_COLOR})\n" \
@@ -1763,17 +1802,18 @@ run_backup () {
 			   "$snapper_source_sync_id" "$snapper_source_sync_snapshot"
 		    printf "Last synced ${GREEN}target${NO_COLOR} snapshot id: ${GREEN}'%s'${NO_COLOR} (path: ${GREEN}'%s'${NO_COLOR})\n" \
 			   "$snapper_target_sync_id" "$snapper_target_sync_snapshot"
-	        fi
+		fi
-	        if [ $verbose -ge 2 ]; then
+		if [ $verbose -ge 2 ]; then
-	            printf "${MAGENTA}Prepare ${GREEN}incremental snapshot${NO_COLOR} (id: ${GREEN}'%s'${NO_COLOR}) for snapper config ${GREEN}'%s'${NO_COLOR} ...\n" \
+		    printf "${MAGENTA}Prepare ${GREEN}incremental snapshot${NO_COLOR} (id: ${GREEN}'%s'${NO_COLOR}) for snapper config ${GREEN}'%s'${NO_COLOR} ...\n" \
 			   "$snapper_target_id" "$selected_config"
-	        fi
+		fi
-	        # verify that we have a matching source and target snapshot-id
+
-	        if [ $snapper_common_sync_id -eq 0 ]; then
+		# verify that we have a matching source and target snapshot-id
+		if [ $snapper_common_sync_id -eq 0 ]; then
 		    if [ ${snapper_source_id} -eq ${snapper_target_sync_id} ]; then
 			# nothing to do, snapshot already in sync
 			if [ $verbose -ge 3 ]; then
-		            printf "${MAGENTA}Nothing to do! Source and target snapshot (id: ${GREEN}'%s'${MAGENTA}) are in sync.${NO_COLOR}\n" \
+			    printf "${MAGENTA}Nothing to do! Source and target snapshot (id: ${GREEN}'%s'${MAGENTA}) are in sync.${NO_COLOR}\n" \
 				   "$snapper_target_sync_id"
 			fi
 			# go for next configuration
@@ -1782,17 +1822,17 @@ run_backup () {
 		    elif [ ${snapper_source_sync_id} != ${snapper_target_sync_id} ]; then
 			if [ $snapper_target_sync_id -lt $snapper_target_id ]; then
 			    # try to find last target_sync_id in source_config
-		            get_snapper_sync_id "snapper_config=${snapper_source_config}" "remote="
+			    get_snapper_sync_id "snapper_config=${snapper_source_config}" "remote="
-		            if [ $? -eq 0 ]; then
+			    if [ $? -eq 0 ]; then
 				snapper_source_sync_id=$snapper_sync_id
 				snapper_source_sync_snapshot=$SUBVOLUME/.snapshots/$snapper_sync_id/$snapper_snapshot_name
-		            else
+			    else
 				printf "${RED}Error: ${MAGENTA}No common sync id found. Aborting backup for config ${GREEN}'%s'${NO_COLOR}\n"
 				error_count=$(($error_count+1))
 				# go for next configuration
 				i=$(($i+1))
 				continue
-		            fi
+			    fi
 			fi
 		    elif [ ${snapper_source_id} != ${snapper_source_sync_id} ]; then
 			snapper_common_sync_id=$snapper_source_sync_id
@@ -1811,18 +1851,22 @@ run_backup () {
 		    fi
 		fi
 
-	        cmd="$ssh stat --format %i $snapper_target_snapshot 2>/dev/null"
+		cmd="$ssh stat --format %i $snapper_target_snapshot 2>/dev/null"
-	        ret=$(eval $cmd)
+		ret=$(eval $cmd)
-	        if [ $? -eq 0 ]; then
+		if [ $? -eq 0 ]; then
+		    # get size of stream that needs to be transfered
+		    check_transfer_size "source_snapshot=$snapper_source_snapshot" "clone_snapshot=$snapper_common_sync_snapshot"
+		    create_pv_cmd
+
 		    case $selected_fstype in
 			btrfs)
-	       		    # Sends the difference between the new snapshot and old synced snapshot.
+			    # Sends the difference between the new snapshot and old synced snapshot.
 			    # Using the flag -c (clone-src) will require the availibility of an identical readonly
 			    # subvolume on the source and the receiving location (the parent-id).
 			    # using "btrfs send -p" instead of "btrfs send -c", then no parent search would be
 			    # needed (Andreij explained in: https://www.spinics.net/lists/linux-btrfs/msg69369.html)
 			    cmd="btrfs send $btrfs_verbose_flag -p $snapper_common_sync_snapshot $snapper_source_snapshot 2>$BTRFS_PIPE \
-			    	| $cmd_pv \
+				| $cmd_pv \
 				$cmd_ionice $ssh btrfs receive $btrfs_verbose_flag $snapper_target_snapshot/ 1>$BTRFS_PIPE 2>&1"
 			    ;;
 			*)
@@ -1830,23 +1874,23 @@ run_backup () {
 			    snapper_target_stream=${snapper_target_id}_incremental.btrfs
 			    if [ -z $remote ]; then
 				cmd="btrfs send $btrfs_verbose_flag -p $snapper_common_sync_snapshot $snapper_source_snapshot 2>$BTRFS_PIPE \
-		     	     	| $cmd_pv \
+				| $cmd_pv \
-			     	$cmd_ionice cat > $snapper_target_snapshot/$snapper_target_stream 2>$BTRFS_PIPE"
+				$cmd_ionice cat > $snapper_target_snapshot/$snapper_target_stream 2>$BTRFS_PIPE"
 			    else
 				cmd="btrfs send $btrfs_verbose_flag -p $snapper_common_sync_snapshot $snapper_source_snapshot 2>$BTRFS_PIPE \
-		     	     	| $cmd_pv \
+				| $cmd_pv \
-			     	$cmd_ionice $ssh 'cat > $snapper_target_snapshot/$snapper_target_stream' 2>$BTRFS_PIPE"
+				$cmd_ionice $ssh 'cat > $snapper_target_snapshot/$snapper_target_stream' 2>$BTRFS_PIPE"
 			    fi
 			    ;;
 		    esac
 		    if [ $verbose -ge 2 ]; then
-		        printf "%b" "${GREEN}btrfs send${NO_COLOR} is using\n" \
+			printf "%b" "${GREEN}btrfs send${NO_COLOR} is using\n" \
 			       "  parent snapshot id: ${GREEN}'$snapper_common_sync_id'${NO_COLOR} (path: ${GREEN}'$snapper_common_sync_snapshot'${NO_COLOR}) and\n" \
 			       "  snapshot id: ${GREEN}'$snapper_source_id'${NO_COLOR} (path: ${GREEN}'$snapper_source_snapshot'${NO_COLOR})\n" \
 			       "  to construct an incremental data-stream ...\n"
 		    fi
 		    if [ $verbose -ge 3 ]; then
-		        printf "${GREEN}btrfs command:${NO_COLOR} '%s'\n" "$cmd"
+			printf "${GREEN}btrfs command:${NO_COLOR} '%s'\n" "$cmd"
 		    fi
 		    $(eval $cmd)
 		    ret=$?
@@ -1874,10 +1918,10 @@ run_backup () {
 			    continue
 			    ;;
 		    esac
-	        else
+		else
 		    # is this clause possible?
 		    if [ $verbose -ge 3 ]; then
-		        printf "${RED}Error: ${MAGENTA}No commen sync snapshot ${GREEN}'%s'${MAGENTA} on ${GREEN}source${MAGENTA} to sync metadata ...${NO_COLOR} \n" \
+			printf "${RED}Error: ${MAGENTA}No commen sync snapshot ${GREEN}'%s'${MAGENTA} on ${GREEN}source${MAGENTA} to sync metadata ...${NO_COLOR} \n" \
 			       "$snapper_common_sync_snapshot"
 			error_count=$(($error_count+1))
 			# go for next configuration
@@ -1885,14 +1929,14 @@ run_backup () {
 			continue
 
 		    fi
-	        fi
+		fi
 	    fi
 	else
 	    printf "${MAGENTA}dryrun${NO_COLOR}: Would run btrfs send / btrfs receive pipe\n"
 	fi
 
 	# send the snapper info metadata
-        if [ $dryrun -eq 0 ]; then
+	if [ $dryrun -eq 0 ]; then
 	    if [ -z "$remote" ]; then
 		cp "$snapper_source_info" "$snapper_target_snapshot/info.xml"
 	    else
@@ -1957,9 +2001,9 @@ run_finalize () {
     SNAP_SYNC_EXCLUDE=no
 
     if [ -f "/etc/snapper/configs/$selected_config" ]; then
-        . /etc/snapper/configs/$selected_config
+	. /etc/snapper/configs/$selected_config
     else
-        printf "${RED}Error: ${MAGENTA}Selected snapper configuration ${GREEN}'$selected_config'${MAGENTA} does not exist${NO_COLOR}"
+	printf "${RED}Error: ${MAGENTA}Selected snapper configuration ${GREEN}'$selected_config'${MAGENTA} does not exist${NO_COLOR}"
 	return 1
     fi
 
@@ -1967,7 +2011,7 @@ run_finalize () {
     if [ "$cont_backup" = "no" ] || [ "$SNAP_SYNC_EXCLUDE" = "yes" ]; then
 	if [ $donotify -gt 0 ]; then
 	    notify_info "Finalize backup" "NOTE: Skipping '$selected_config' configuration."
-        fi
+	fi
 	continue
     fi
 
@@ -2038,8 +2082,8 @@ run_finalize () {
 		# save target-id
 		if [ $snapper_source_id -gt 0 ]; then
 		    cmd="snapper --config $selected_config modify \
-		    	 --cleanup-algorithm \"dsnap-sync\" \
+			 --cleanup-algorithm \"dsnap-sync\" \
-		    	 --userdata \"tapeid=$volume_name\" \
+			 --userdata \"tapeid=$volume_name\" \
 			 $snapper_source_id"
 
 		    if [ $verbose -ge 3 ]; then
@@ -2068,8 +2112,8 @@ run_finalize () {
 		;;
 	    btrfs-snapshot)
 		# create btrfs-snapshot on target
-	        cmd="$ssh snapper --config \"$snapper_target_config\" list --type single \
+		cmd="$ssh snapper --config \"$snapper_target_config\" list --type single \
-	    	    | awk ' /'\"$snap_description_running\"'/ ' \
+		    | awk ' /'\"$snap_description_running\"'/ ' \
 		    | awk -F '|' ' \$1 == $snapper_target_id {print \$1} ' "
 		;;
 	esac
@@ -2087,7 +2131,7 @@ run_finalize () {
 			    printf "${MAGENTA}Found${NO_COLOR} snapper id ${GREEN}'%s'${NO_COLOR} on target for configuration ${GREEN}'%s'${NO_COLOR}\n" \
 				   "$snapper_target_id" "$snapper_target_config"
 			fi
- 			if [ $verbose -ge 3 ]; then
+			if [ $verbose -ge 3 ]; then
 			    printf "${MAGENTA}Tagging metadata${NO_COLOR} for snapper id ${GREEN}'%s'${NO_COLOR} on target for configuration ${GREEN}'%s'${NO_COLOR} ...\n" \
 				   "$snapper_target_id" "$snapper_target_config"
 			    #printf "calling: '%s'\n" "$($cmd)"
@@ -2095,16 +2139,16 @@ run_finalize () {
 			# call command (respect needed quotes)
 			if [ $remote ]; then
 			    ret=$(eval $ssh snapper --config \\\'$snapper_target_config\\\' modify  \
-			    	       --description \\\'$snap_description_finished\\\' \
+				       --description \\\'$snap_description_finished\\\' \
-			    	       --userdata \\\'host=$src_host, subvolid=$src_subvolid, uuid=$src_uuid\\\' \
+				       --userdata \\\'host=$src_host, subvolid=$src_subvolid, uuid=$src_uuid\\\' \
-			    	       --cleanup-algorithm \'timeline\' \
+				       --cleanup-algorithm \'timeline\' \
-			    	       \'$snapper_target_id\')
+				       \'$snapper_target_id\')
 			else
 			    ret=$(eval snapper --config $snapper_target_config modify \
-			    	       --description "$snap_description_finished" \
+				       --description "$snap_description_finished" \
 				       --userdata "host=$src_host, subvolid=$src_subvolid, uuid=$src_uuid" \
 				       --cleanup-algorithm "timeline" \
-			     	       $snapper_target_id)
+				       $snapper_target_id)
 			fi
 			if [ $verbose -ge 3 ]; then
 			    printf "return: '%s'\n" "$ret"
@@ -2127,7 +2171,7 @@ run_finalize () {
 	fi
 	if [ $snapper_source_id -gt 0 ]; then
 	    cmd="snapper --config $selected_config modify \
-	    		 --description \"$snap_description_synced\" \
+			 --description \"$snap_description_synced\" \
 			 --userdata \"backupdir=$backupdir, important=yes, host=$remote, subvolid=$selected_subvol, uuid=$selected_uuid\" \
 			 --cleanup-algorithm \"timeline\" \
 			 $snapper_source_id"
@@ -2152,7 +2196,7 @@ run_finalize () {
 	if [ ${#snapper_source_sync_id} -gt 0 ]; then
 	    # TODO: no snapper method to remove userdata pair, use awk
 	    cmd="snapper --config $selected_config modify \
-	    		 --description \"$snap_description_finished\" \
+			 --description \"$snap_description_finished\" \
 			 --userdata \"important=no\" \
 			 $snapper_source_sync_id"
 
@@ -2208,9 +2252,9 @@ select_target () {
     # print selection table
     if [ $verbose -ge 2 ]; then
 	if [ -z "$remote" ]; then
-            printf "Selecting a mounted device for backups on your local machine.\n"
+	    printf "Selecting a mounted device for backups on your local machine.\n"
 	else
-            printf "Selecting a mounted device for backups on %s.\n" "$remote"
+	    printf "Selecting a mounted device for backups on %s.\n" "$remote"
 	fi
     fi
     while [ "$target_id" -eq 0 ] || [ "$target_id" -le $target_count ]; do
@@ -2310,7 +2354,7 @@ select_target () {
 	esac
     done
     if [ "$target_selected" = x ]; then
-        exit 0
+	exit 0
     fi
 
     selected_target=$(eval echo \$target_$target_selected)
@@ -2376,9 +2420,9 @@ select_target_disk () {
     # print selection table
     if [ $verbose -ge 2 ]; then
 	if [ -z "$remote" ]; then
-            printf "Selecting a mounted BTRFS device for backups on your local machine.\n"
+	    printf "Selecting a mounted BTRFS device for backups on your local machine.\n"
 	else
-            printf "Selecting a mounted BTRFS device for backups on %s.\n" "$remote"
+	    printf "Selecting a mounted BTRFS device for backups on %s.\n" "$remote"
 	fi
     fi
     while [ "$disk_id" -eq -1 ] || [ "$disk_id" -le $disk_count ]; do
@@ -2450,7 +2494,7 @@ select_target_disk () {
 	esac
     done
     if [ "$disk_selected" = x ]; then
-        exit 0
+	exit 0
     fi
 
     selected_uuid=$(eval echo \$disk_uuid_$disk_selected)
@@ -2507,9 +2551,9 @@ select_target_tape () {
     # print selection table
     if [ $verbose -ge 2 ]; then
 	if [ -z "$remote" ]; then
-            printf "Selecting a mounted LTFS tape for backups on your local machine.\n"
+	    printf "Selecting a mounted LTFS tape for backups on your local machine.\n"
 	else
-            printf "Selecting a mounted LTFS tape for backups on %s.\n" "$remote"
+	    printf "Selecting a mounted LTFS tape for backups on %s.\n" "$remote"
 	fi
     fi
     while [ "$tape_id" -eq -1 ] || [ "$tape_id" -le $tape_count ]; do
@@ -2582,7 +2626,7 @@ select_target_tape () {
 	esac
     done
     if [ "$tape_selected" = x ]; then
-        exit 0
+	exit 0
     fi
 
     selected_tape_id=$(eval echo \$tape_id_$tape_selected)
@@ -2665,11 +2709,11 @@ Options:
      --label-finished <desc> snapper description tagging successful jobs. Default: "dsnap-sync backup"
      --label-running <desc>  snapper description tagging active jobs. Default: "dsnap-sync in progress"
      --label-synced <desc>   snapper description tagging last synced jobs
-                             Default: "dsnap-sync last incremental"
+			     Default: "dsnap-sync last incremental"
      --color                 Enable colored output messages
  -c, --config <config>       Specify the snapper configuration to use. Otherwise will perform for each snapper
-                             configuration. You can select multiple configurations
+			     configuration. You can select multiple configurations
-                             (e.g. -c "root" -c "home"; --config root --config home)
+			     (e.g. -c "root" -c "home"; --config root --config home)
      --config-postfix <name> Specify a postfix that will be appended to the destination snapper config name
      --dry-run               perform a trial run (no changes are written)
      --mediapool             Specify the name of the tape MediaPool
@@ -2680,12 +2724,12 @@ Options:
      --noionice              Disable setting of I/O class and priority options on target
  -p, --port <port>           The remote port
  -r, --remote <address>      Send the snapshot backup to a remote machine. The snapshot will be sent via ssh
-                             You should specify the remote machine's hostname or ip address. The 'root' user
+			     You should specify the remote machine's hostname or ip address. The 'root' user
-                             must be permitted to login on the remote machine
+			     must be permitted to login on the remote machine
  -s, --subvolid <subvlid>    Specify the subvolume id of the mounted BTRFS subvolume to back up to. Defaults to 5
      --use-btrfs-quota       use btrfs-quota to calculate snapshot size
  -u, --uuid <UUID>           Specify the UUID of the mounted BTRFS subvolume to back up to. Otherwise will prompt
-                             If multiple mount points are found with the same UUID, will prompt user selection
+			     If multiple mount points are found with the same UUID, will prompt user selection
  -t, --target <target>       Specify the mountpoint of the backup device
      --volumename            Specify the name of the tape volume
  -v, --verbose               Be verbose on what's going on (min: --verbose=1, max: --verbose=3)
@@ -2918,13 +2962,13 @@ verify_snapper_structure () {
 	# no inode for given backup_root
 	if [ $dryrun -eq 0 ]; then
 	    if [ $verbose -ge 2 ]; then
-	        if [ -z "$remote" ]; then
+		if [ -z "$remote" ]; then
-	            printf "${MAGENTA}Create${NO_COLOR} new snapper capable BTRFS ${MAGENTA}subvolume ${GREEN}'%s'${NO_COLOR} ...\n"  \
+		    printf "${MAGENTA}Create${NO_COLOR} new snapper capable BTRFS ${MAGENTA}subvolume ${GREEN}'%s'${NO_COLOR} ...\n"  \
 			   "$backup_root"
-	        else
+		else
 		    printf "${MAGENTA}Create${NO_COLOR} new snapper capable BTRFS ${MAGENTA}subvolume ${GREEN}'%s'${NO_COLOR} on ${MAGENTA}remote host ${GREEN}'%s'${NO_COLOR} ...\n" \
 			   "$backup_root" "$remote_host"
-	        fi
+		fi
 	    fi
 	    # verify that we can use the correct snapper template
 	    cmd="$ssh stat --format %i $SNAPPER_TEMPLATE_DIR/$snapper_subvolume_template 2>/dev/null"
@@ -2937,7 +2981,7 @@ verify_snapper_structure () {
 		#die "snapper template %s to configure the snapper subvolume %s is missing in %s on %s.\n" \
 		#    "$snapper_subvolume_template" "$snapper_config" "$SNAPPER_TEMPLATE_DIR" "$remote_host"
 	    fi
-            # create the non existing remote BTRFS subvolume for given config
+	    # create the non existing remote BTRFS subvolume for given config
 	    cmd="$ssh btrfs subvolume create $backup_root 1>/dev/null"
 	    ret=$(eval $cmd)
 	    if [ $? -ne 0 ]; then
@@ -2992,14 +3036,14 @@ verify_snapper_structure () {
 	if [ $? -eq 1 ]; then
 	    # path does not exist, let snapper create the structure
 	    # and path $backup_root/.snapshots
-    	    cmd="$ssh snapper --config $snapper_config create-config \
+	    cmd="$ssh snapper --config $snapper_config create-config \
-	    	      --template $snapper_subvolume_template \
+		      --template $snapper_subvolume_template \
 		      --fstype btrfs $backup_root"
 	    if [ $verbose -ge 2 ]; then
 		printf "${MAGENTA}Create new BTRFS subvolume ${GREEN}'%s'${NO_COLOR} using template ${GREEN}'%s'${NO_COLOR}\n" \
 		       $snapper_config $snapper_subvolume_template
 	    fi
-       	    $(eval $cmd)
+	    $(eval $cmd)
 	    if [ $? -ne 0 ]; then
 		if [ $remote ]; then
 		    printf "${RED}Error: ${MAGENTA}Creation of snapper capable config ${GREEN}%s${MAGENTA} on ${GREEN}%s${MAGENTA} failed${NO_COLOR}\n" \
@@ -3010,8 +3054,8 @@ verify_snapper_structure () {
 		fi
 		return 1
 	    fi
-    	else
+	else
-       	    # WIP:
+	    # WIP:
 	    # snapper_config exist, now verify if SUBVOLUME needs to be updated
 	    cmd="$ssh snapper list-configs | awk -F '|' '/'\"^$snapper_config\"'/ {print \$1}'"
 	    #cmd="$ssh snapper list-configs | awk '/'\"^$snapper_config\"'/' | awk -F '|' ' /'\$1 == "$snapper_config"'/ {print \$1}'"
@@ -3039,10 +3083,10 @@ verify_snapper_structure () {
 			   $backup_root/$snapper_snapshots
 		fi
 		cmd="$ssh btrfs subvolume create $backup_root/$snapper_snapshots 2>/dev/null"
-       		ret=$(eval $cmd)
+		ret=$(eval $cmd)
 		if [ $? -ne 0 ]; then
 		    printf "${RED}Error: ${MAGENTA}Creation of snapper subvolume ${GREEN}%s${MAGENTA} failed${NO_COLOR}\n" \
-		           "$backup_root/$snapper_snapshots"
+			   "$backup_root/$snapper_snapshots"
 		    return 1
 		fi
 	    else
@@ -3083,7 +3127,7 @@ verify_snapper_structure () {
 	    cmd="$ssh stat --format %i $backup_root/$snapper_snapshots/$snapper_id/$snapper_snapshot_name 2>/dev/null"
 	    ret=$(eval $cmd)
 	    if [ $? -eq 0 ] && [ $ret -ne 256 ]; then
-                # a snapshot path exists, but is not a btrfs snapshot
+		# a snapshot path exists, but is not a btrfs snapshot
 		if [ -z "$remote" ]; then
 		    printf "${RED}Cancel snapshot creation${NO_COLOR}: Directory with id ${GREEN}'%s'${NO_COLOR} already exist in ${BLUE}'%s'${NO_COLOR}, but isn't a btrfs snapshot\n" \
 			   "$snapper_id" "$backup_root/$snapper_snapshots"

bin/tape-admin

@@ -22,7 +22,7 @@
 # Helper routines for tape handling
 
 progname="${0##*/}"
-version="0.0.14"
+version="0.0.15"
 
 # global variables
 color=0
@@ -140,7 +140,7 @@ add_retensiondays_to_retensiondate () {
 	if [ $? -eq 0 ]; then
 	    cmd="jq --monochrome-output --ascii-output '(.MediaPool[] \
 		| select(.Name == \"$mediapool_name\") \
-	    	| .Member[$tape_index] \
+		| .Member[$tape_index] \
 		| .RetensionDate) \
 		|= \"$volume_retensiondate\" ' \
 		${mediapools_json} > $XDG_RUNTIME_DIR/$json_file"
@@ -148,10 +148,10 @@ add_retensiondays_to_retensiondate () {
 	    if [ $? -eq 0 ]; then
 		cp "$XDG_RUNTIME_DIR/$json_file" "$mediapools_json"
 	    else
-	        if [ $verbose -ge 1 ]; then
+		if [ $verbose -ge 1 ]; then
-	            printf "${RED}Error:${MAGENTA} Can't update RetensionDate ${GREEN}'%s'${MAGENTA} for Tape ${GREEN}'%s'${NO_COLOR}\n" \
+		    printf "${RED}Error:${MAGENTA} Can't update RetensionDate ${GREEN}'%s'${MAGENTA} for Tape ${GREEN}'%s'${NO_COLOR}\n" \
-		           "$volume_retensiondate" "$volume_name"
+			   "$volume_retensiondate" "$volume_name"
-	        fi
+		fi
 		return 1
 	    fi
 	else
@@ -294,15 +294,15 @@ get_lastwrite () {
 
 	# select last write date for given volume
 	cmd="jq --monochrome-output --ascii-output ' .MediaPool[] \
-    	    | select(.Name == \"${mediapool_name}\") \
+	    | select(.Name == \"${mediapool_name}\") \
 	    | .Member[] \
-    	    | select(.VolumeName == \"${volume_name}\") \
+	    | select(.VolumeName == \"${volume_name}\") \
 	    | .LastWrite ' \
 	    ${mediapools_json}"
     else
 	# select volume with latest write date
 	cmd="jq --monochrome-output --ascii-output ' .MediaPool[] \
-    	    | select(.Name == \"${mediapool_name}\") \
+	    | select(.Name == \"${mediapool_name}\") \
 	    | .Member \
 	    | map({ \"VolumeName\" : .VolumeName, \"LastWrite\" : ( .LastWrite | scan(\"[0-9]{14}\")) }) \
 	    | sort_by(.LastWrite) \
@@ -312,7 +312,7 @@ get_lastwrite () {
 	volume_name=$(eval $cmd)
 	volume_name=$(echo $volume_name | sed -e 's/"//g')
 	cmd="jq --monochrome-output --ascii-output ' .MediaPool[] \
-    	    | select(.Name == \"${mediapool_name}\") \
+	    | select(.Name == \"${mediapool_name}\") \
 	    | .Member \
 	    | map({ \"VolumeName\" : .VolumeName, \"LastWrite\" : ( .LastWrite | scan(\"[0-9]{14}\")) }) \
 	    | sort_by(.LastWrite) \
@@ -351,9 +351,9 @@ get_mediapolicy () {
     fi
 
     cmd="jq --monochrome-output --ascii-output ' .MediaPool[] \
-    	    | select(.Name == \"${mediapool_name}\") \
+	    | select(.Name == \"${mediapool_name}\") \
 	    | .Member[] \
-    	    | select(.VolumeName == \"${volume_name}\") \
+	    | select(.VolumeName == \"${volume_name}\") \
 	    | .MediaPolicy ' \
 	    ${mediapools_json}"
     volume_mediapolicy=$(eval $cmd)
@@ -444,8 +444,8 @@ get_mediapool_retensiondays () {
     if [ ${#mediapool_name} -ge 1 ]; then
 	# select default retension days for given pool
 	cmd="jq --monochrome-output --ascii-output ' .MediaPool[] \
-    	    | select(.Name == \"${mediapool_name}\") \
+	    | select(.Name == \"${mediapool_name}\") \
-    	    | .DefaultRetensionDays ' \
+	    | .DefaultRetensionDays ' \
 	    ${mediapools_json}"
     fi
     mediapool_defaultretensiondays=$(eval $cmd)
@@ -483,8 +483,8 @@ get_poolmember () {
     fi
 
     cmd="jq --monochrome-output --ascii-output '.MediaPool[] \
-    	    | select(.Name == \"${mediapool_name}\") \
+	    | select(.Name == \"${mediapool_name}\") \
-    	    | .Member[].VolumeName' \
+	    | .Member[].VolumeName' \
 	    ${mediapools_json}"
     poolmember=$(eval $cmd)
     poolmember=$(echo $poolmember | sed -e 's/"//g')
@@ -496,16 +496,16 @@ get_poolmember () {
 
     i=0
     for i in $poolmember ; do
-        if [ "$volume_name" = "any" ]; then
+	if [ "$volume_name" = "any" ]; then
-            volume_name=$i
+	    volume_name=$i
 	    if [ $verbose -ge 2 ]; then
 		printf "${MAGENTA}selecting first volume_name ${GREEN}'%s'${MAGENTA} from media-pool ${GREEN}'%s'${NO_COLOR}\n" \
 		       "$i" "$mediapool_name"
 	    fi
 	    return 0
 	    break
-        fi
+	fi
-        if test "$i" = "${volume_name}"; then
+	if test "$i" = "${volume_name}"; then
 	    if [ $verbose -ge 2 ]; then
 		printf "${MAGENTA}volume_name ${GREEN}'%s'${MAGENTA} is member of media-pool ${GREEN}'%s'${NO_COLOR}\n" \
 		       "$i" "$mediapool_name"
@@ -541,7 +541,7 @@ get_poolmember_next () {
 	return 1
 
     cmd="jq --monochrome-output --ascii-output ' .MediaPool[] \
-    	    | select(.Name == \"${mediapool_name}\") \
+	    | select(.Name == \"${mediapool_name}\") \
 	    | .Member \
 	    | map({ \"VolumeName\" : .VolumeName, \"LastWrite\" : ( .LastWrite | scan(\"[0-9]{14}\")) }) \
 	    | sort_by(.LastWrite) \
@@ -601,9 +601,9 @@ get_slot () {
 	return 1
 
     cmd="jq --monochrome-output --ascii-output ' .MediaPool[] \
-    	    | select(.Name == \"${mediapool_name}\") \
+	    | select(.Name == \"${mediapool_name}\") \
 	    | .Member[] \
-    	    | select(.VolumeName == \"${volume_name}\") \
+	    | select(.VolumeName == \"${volume_name}\") \
 	    | .Slot ' \
 	    ${mediapools_json}"
     volume_slot=$(eval $cmd)
@@ -639,9 +639,9 @@ get_retensiondate () {
 	return 1
 
     cmd="jq --monochrome-output --ascii-output '(.MediaPool[] \
-    	    | select(.Name == \"${mediapool_name}\") \
+	    | select(.Name == \"${mediapool_name}\") \
 	    | .Member[] \
-    	    | select(.VolumeName == \"${volume_name}\")) \
+	    | select(.VolumeName == \"${volume_name}\")) \
 	    | .RetensionDate ' \
 	    ${mediapools_json}"
     volume_retensiondate=$(eval $cmd)
@@ -724,8 +724,8 @@ ltfs_format () {
     fi
 
     if [ ${#volume_serial} -eq 0 ]; then
-        tape_id=$(echo $volume_name | sed -e 's/\([[:alpha:]]*-\)//g')
+	tape_id=$(echo $volume_name | sed -e 's/\([[:alpha:]]*-\)//g')
-        # tape_id needs to be exactly 6 character long
+	# tape_id needs to be exactly 6 character long
 	volume_serial=$(printf "%0.s0" $(seq 1 $((6 - ${#tape_id}))))
 	volume_serial="${volume_serial}${tape_id}"
     fi
@@ -778,7 +778,7 @@ ltfs_mount () {
 	if [ ! -d $ltfs_mountpoint ]; then
 	    mkdir -p $ltfs_mountpoint
 	fi
-        make_err_file
+	make_err_file
 	if [ $verbose -ge 2 ]; then
 	    printf "${MAGENTA}LTFS mounting tape ${GREEN}'%s'${MAGENTA} to ${GREEN}'%s'${NO_COLOR}\n" \
 		   "$ltfs_devname" "$ltfs_mountpoint"
@@ -791,16 +791,16 @@ ltfs_mount () {
 	    return 0
 	else
 	    # format tape if needed
-            if [ -z $volume_name_active ]; then
+	    if [ -z $volume_name_active ]; then
-                slot_source="0"
+		slot_source="0"
-                mtx_getlabel $slot_source
+		mtx_getlabel $slot_source
-            fi
+	    fi
-            need_format=$(grep "medium is not partitioned" ${ERRFILE})
+	    need_format=$(grep "medium is not partitioned" ${ERRFILE})
-            rm -f ${ERRFILE}
+	    rm -f ${ERRFILE}
-            if [ ${#need_format} -ge 1 ]; then
+	    if [ ${#need_format} -ge 1 ]; then
 		ltfs_format ${volume_name_active}
-                ltfs_mount
+		ltfs_mount
-            fi
+	    fi
 	    return $?
 	fi
     else
@@ -901,8 +901,8 @@ ltfs_reformat () {
 	    fi
 	    # wiping: put tape in an unformatted state
 	    ltfs_wipe
-	    # RET = 8 -> error?
 	    if [ $? -eq 0 ]; then
+		# format: create the ltfs partitions
 		ltfs_format $volume_name_active $volume_serial
 		if [ $? -eq 0 ]; then
 		    ltfs_mount
@@ -1091,7 +1091,7 @@ mount_tape () {
 
     ltfs_is_mounted
     if test $? -eq 0; then
-        # get date from last written tape in given mediapool
+	# if no explicit tape should be mounted, get date from last written tape in given mediapool
 	if [ "${#volume_name}" -eq 0 ]; then
 	    get_lastwrite ${mediapool_name}
 	    if [ $? != 0 ]; then
@@ -1106,7 +1106,7 @@ mount_tape () {
 		printf "${MAGENTA}Active tape in drive: ${GREEN}%s${NO_COLOR}\n" \
 		       "${volume_name_active}"
 	    fi
-            if [ "${#volume_name_active}" -ge 1 ] && [ "${volume_name_active}" != "${volume_name}" ]; then
+	    if [ "${#volume_name_active}" -ge 1 ] && [ "${volume_name_active}" != "${volume_name}" ]; then
 		if [ $verbose -ge 2 ]; then
 		    printf "${MAGENTA}Re-Mounting requested Tape: ${GREEN}%s${NO_COLOR}\n" \
 			   "${volume_name}"
@@ -1128,92 +1128,94 @@ mount_tape () {
 	# check if given tape is poolmember of selected pool
 	get_poolmember ${mediapool_name} ${volume_name}
 	if [ $? -eq 0 ]; then
-	    # volume_name is member of given mediapool
+	    # check the mediapolicy for given volume_name
 	    get_mediapolicy ${mediapool_name} ${volume_name_active}
 	    if [ ${#volume_mediapolicy} -gt 0  ]; then
 		if [ ${volume_mediapolicy} = "append" ] ; then
-	          if [ $verbose -ge 2 ]; then
+		  if [ $verbose -ge 2 ]; then
-	            printf "${MAGENTA}Valid tape mediapolicy: ${GREEN}%s${NO_COLOR}\n" \
+		    printf "${MAGENTA}Valid tape mediapolicy: ${GREEN}%s${NO_COLOR}\n" \
-		           "${volume_mediapolicy}"
+			   "${volume_mediapolicy}"
-	          fi
+		  fi
 		  volume_retensiondate="20180101000000"
 		  get_retensiondate ${mediapool_name} ${volume_name}
-	    	  if [ $? -eq 0 ]; then
+		  if [ $? -eq 0 ]; then
 		      date_now=$($date_cmd)
-	    	      compare_date $date_now $volume_retensiondate
+		      compare_date $date_now $volume_retensiondate
-	    	      if [ $? -eq 2 ]; then
+		      if [ $? -eq 2 ]; then
 			  # retensiondate has exposed: use it
-	          	  if [ $verbose -ge 3 ]; then
+			  if [ $verbose -ge 3 ]; then
-	            	      printf "${MAGENTA}Valid tape, retensiondate has exposed: ${GREEN}%s${NO_COLOR}\n" \
+			      printf "${MAGENTA}Valid tape, retensiondate has exposed: ${GREEN}%s${NO_COLOR}\n" \
-		                     "${volume_retensiondate}"
+				     "${volume_retensiondate}"
-	          	  fi
+			  fi
+			  #ltfs_format ${volume_name_active}
+			  ltfs_reformat ${volume_name_active}
 			  return 0
-	    	      fi
+		      fi
-	    	      if [ $? -eq 1 ]; then
+		      if [ $? -eq 1 ]; then
 			  # respect active retensiondate: unload given tape
-	          	  if [ $verbose -ge 3 ]; then
+			  if [ $verbose -ge 3 ]; then
-	            	      printf "${MAGENTA}Invalid tape ${GREEN}%s${MAGANTA}, respect retensiondate: ${GREEN}%s${NO_COLOR}\n" \
+			      printf "${MAGENTA}Invalid tape ${GREEN}%s${MAGANTA}, respect retensiondate: ${GREEN}%s${NO_COLOR}\n" \
-		                     "${volume_name}" "${volume_retensiondate}"
+				     "${volume_name}" "${volume_retensiondate}"
-	          	  fi
+			  fi
 			  ltfs_umount
 			  mtx_unload
 			  # use next volume_name from pool
-	          	  if [ $verbose -ge 3 ]; then
+			  if [ $verbose -ge 3 ]; then
-	            	      printf "${MAGENTA}Get next tape from MediaPool ${GREEN}%s${MAGANTA}\n" \
+			      printf "${MAGENTA}Get next tape from MediaPool ${GREEN}%s${MAGANTA}\n" \
-		                     "${mediapool_name}"
+				     "${mediapool_name}"
-	          	  fi
+			  fi
 			  get_poolmember_next ${mediapool_name} ${volume_name}
 			  get_slot ${mediapool_name} ${volume_name_next}
 			  mtx_load ${volume_slot}
 			  ltfs_mount
 			  if [ $? -eq 0 ]; then
-		              return 0
+			      return 0
 			  fi
-	    	      fi
+		      fi
 		      return 0
 		  fi
 		  if [ ${volume_mediapolicy} = "overwrite" ] ; then
-	              if [ $verbose -ge 2 ]; then
+		      if [ $verbose -ge 2 ]; then
-	                printf "${MAGENTA}Valid tape mediapolicy: ${GREEN}%s${NO_COLOR}\n" \
+			printf "${MAGENTA}Valid tape mediapolicy: ${GREEN}%s${NO_COLOR}\n" \
-		               "${volume_mediapolicy}"
+			       "${volume_mediapolicy}"
-	              fi
+		      fi
 		      volume_retensiondate="20180101000000"
 		      get_retensiondate ${mediapool_name} ${volume_name}
-	    	      date_now=$($date_cmd)
+		      date_now=$($date_cmd)
-	    	      compare_date $date_now $volume_retensiondate
+		      compare_date $date_now $volume_retensiondate
-	    	      if [ $? -eq 2 ]; then
+		      if [ $? -eq 2 ]; then
 			  # retensiondate has exposed: wipe given tape
-	          	  if [ $verbose -ge 3 ]; then
+			  if [ $verbose -ge 3 ]; then
-	            	      printf "${MAGENTA}Valid tape, wipe and reformat: ${GREEN}%s${NO_COLOR}\n" \
+			      printf "${MAGENTA}Valid tape, wipe and reformat: ${GREEN}%s${NO_COLOR}\n" \
-		                     "${volume_name}"
+				     "${volume_name}"
-	          	  fi
+			  fi
 			  ltfs_wipe
-			  #ltfs_format ${volume_name} ${volume_serial}
+			  #ltfs_reformat ${volume_name_active}
-	                  if [ $? -eq 0 ]; then
+			  if [ $? -eq 0 ]; then
-		              return 0
+			      return 0
-                          fi
+			  fi
-	    	      fi
+		      fi
-	    	      if [ $? -eq 1 ]; then
+		      if [ $? -eq 1 ]; then
 			  # respect active retensiondate: unload given tape
-	          	  if [ $verbose -ge 3 ]; then
+			  if [ $verbose -ge 3 ]; then
-	            	      printf "${MAGENTA}Invalid tape ${GREEN}%s${MAGANTA}, respect retensiondate: ${GREEN}%s${NO_COLOR}\n" \
+			      printf "${MAGENTA}Invalid tape ${GREEN}%s${MAGANTA}, respect retensiondate: ${GREEN}%s${NO_COLOR}\n" \
-		                     "${volume_name}" "${volume_retensiondate}"
+				     "${volume_name}" "${volume_retensiondate}"
-	          	  fi
+			  fi
 			  ltfs_umount
 			  mtx_unload
 			  # use next volume_name from pool
-	          	  if [ $verbose -ge 3 ]; then
+			  if [ $verbose -ge 3 ]; then
-	            	      printf "${MAGENTA}Get next tape from MediaPool ${GREEN}%s${MAGANTA}\n" \
+			      printf "${MAGENTA}Get next tape from MediaPool ${GREEN}%s${MAGANTA}\n" \
-		                     "${mediapool_name}"
+				     "${mediapool_name}"
-	          	  fi
+			  fi
 			  get_poolmember_next ${mediapool_name} ${volume_name}
 			  get_slot ${mediapool_name} ${volume_name_next}
 			  mtx_load ${volume_slot}
 			  ltfs_mount
-	                  if [ $? -eq 0 ]; then
+			  if [ $? -eq 0 ]; then
 			      return 0
-                          fi
+			  fi
-	    	      fi
+		      fi
 		  fi
 		fi
 	    fi
@@ -1258,14 +1260,14 @@ mount_tape () {
 		printf "${MAGENTA}Tape in drive: ${GREEN}%s${NO_COLOR}\n" \
 		       "${volume_name_active}"
 	    fi
-            if [ "${#volume_name_active}" -gt 1 ] && [ "${volume_name_active}" != "${volume_name}" ]; then
+	    if [ "${#volume_name_active}" -gt 1 ] && [ "${volume_name_active}" != "${volume_name}" ]; then
 		if [ $verbose -ge 2 ]; then
 		    printf "${MAGENTA}Active tape ${GREEN}%s${MAGENTA} needs to be exchanged with ${GREEN}%s${NO_COLOR}\n" \
 			   "${volume_name_active}" "${volume_name}"
 		fi
 		mtx_unload
 		if [ $? -eq 0 ]; then
-                    mount_tape "${mediapool_name}" "${volume_name}"
+		    mount_tape "${mediapool_name}" "${volume_name}"
 		    if [ $? -eq 0 ]; then
 			return 0
 		    else
@@ -1287,25 +1289,25 @@ mount_tape () {
 	get_mediapolicy ${mediapool_name} ${volume_name}
 	if [ ${#volume_mediapolicy} -gt 0  ]; then
 	    if [ ${volume_mediapolicy} = "append" ] ; then
-	        if [ $verbose -ge 2 ]; then
+		if [ $verbose -ge 2 ]; then
-	            printf "${MAGENTA}Valid tape mediapolicy: ${GREEN}%s${NO_COLOR}\n" \
+		    printf "${MAGENTA}Valid tape mediapolicy: ${GREEN}%s${NO_COLOR}\n" \
-		           "${volume_mediapolicy}"
+			   "${volume_mediapolicy}"
-	        fi
+		fi
 		#volume_retensiondate="20180101000000"
 		get_retensiondate ${mediapool_name} ${volume_name}
-	    	date_now=$($date_cmd)
+		date_now=$($date_cmd)
-	    	compare_date $date_now $volume_retensiondate
+		compare_date $date_now $volume_retensiondate
-	        RET=$?
+		RET=$?
 		if [ $RET -eq 2 ]; then
 		    if [ $verbose -ge 1 ]; then
-			printf "${MAGENTA}RetensionDate has exposed, mount the tape\n"
+			printf "${MAGENTA}RetensionDate has exposed, mount the tape${NO_COLOR}\n"
-	    	    fi
+		    fi
 		    ltfs_mount
 		    return 0
 		elif [ $RET -eq 1 ]; then
 		    if [ $verbose -ge 1 ]; then
 			printf "${MAGENTA}Tape is bocked via RetensionDate.\n"
-	    	    fi
+		    fi
 		    get_poolmember_next "${mediapool_name}"
 		    if test $? -eq 0; then
 			if [ $verbose -ge 2 ]; then
@@ -1316,22 +1318,22 @@ mount_tape () {
 			mount_tape "${mediapool_name}" "${volume_name_next}"
 			return 0
 		    fi
-	    	fi
+		fi
 	    fi
 	    if [ ${volume_mediapolicy} = "overwrite" ] ; then
 		volume_retensiondate="20180101000000"
 		get_retensiondate ${mediapool_name} ${volume_name}
-	    	date_now=$($date_cmd)
+		date_now=$($date_cmd)
-	    	compare_date $date_now $volume_retensiondate
+		compare_date $date_now $volume_retensiondate
-	    	if [ $? -eq 2 ]; then
+		if [ $? -eq 2 ]; then
 		    # retensiondate has exposed: wipe given tape
 		    ltfs_wipe
-		    #ltfs_format ${volume_name} ${volume_serial}
+		    ltfs_format ${volume_name} ${volume_serial}
 		    if [ $? -eq 0 ]; then
-		        return 0
+			return 0
 		    fi
-	    	fi
+		fi
-	    	if [ $? -eq 1 ]; then
+		if [ $? -eq 1 ]; then
 		    # respect active retensiondate: unload given tape
 		    mtx_unload
 		    if [ $? -eq 0 ]; then
@@ -1384,9 +1386,9 @@ mtx_getlabel () {
 		       "${MTX}" "${changer_device}" "${slot_source}"
 	    fi
 	    volume_name_active=$(perl -ne '
-	    	/Data Transfer Element (\d+):Full \(Storage Element (\d+) Loaded\)(:VolumeTag =\s*(.+))?/ && print "$4\n";' ${TMPFILE})
+		/Data Transfer Element (\d+):Full \(Storage Element (\d+) Loaded\)(:VolumeTag =\s*(.+))?/ && print "$4\n";' ${TMPFILE})
-            volume_name_active=$(echo $volume_name_active | sed -e 's/ *$//g')
+	    volume_name_active=$(echo $volume_name_active | sed -e 's/ *$//g')
-	    if [ $verbose -ge 2 ]; then
+	    if [ $verbose -ge 2 ] && [ ${#volume_name_active} -gt 0 ]; then
 		printf "${MAGENTA}Tape in slot ${GREEN}%s${MAGENTA} has Label: ${GREEN}%s${NO_COLOR}\n" \
 		       "${slot_source}" "${volume_name_active}"
 	    fi
@@ -1397,8 +1399,8 @@ mtx_getlabel () {
 		       "${MTX}" "${changer_device}" "${slot_source}"
 	    fi
 	    volume_name=$(perl -ne '
-	    	/Storage Element ($ENV{"slot_source"}):Full( :VolumeTag=(.+))?/ && print "$3\n";' ${TMPFILE})
+		/Storage Element ($ENV{"slot_source"}):Full( :VolumeTag=(.+))?/ && print "$3\n";' ${TMPFILE})
-            volume_name=$(echo $volume_name | sed -e 's/ *$//g')
+	    volume_name=$(echo $volume_name | sed -e 's/ *$//g')
 	    if [ $verbose -ge 2 ]; then
 		printf "${MAGENTA}Tape in slot ${GREEN}%s${MAGENTA} has Label: ${GREEN}%s${NO_COLOR}\n" \
 		       "${slot_source}" "${volume_name}"
@@ -2030,7 +2032,7 @@ update_lastwrite () {
 	if [ $? -eq 0 ]; then
 	    cmd="jq --monochrome-output --ascii-output '(.MediaPool[] \
 		| select(.Name == \"$mediapool_name\") \
-	    	| .Member[$tape_index] \
+		| .Member[$tape_index] \
 		| .LastWrite) \
 		|= \"$volume_lastwrite\" ' \
 		${mediapools_json} > $XDG_RUNTIME_DIR/$json_file"
@@ -2082,10 +2084,10 @@ update_mediapool_retensiondays () {
 	    if [ $? -eq 0 ]; then
 		cp "$XDG_RUNTIME_DIR/$json_file" "$mediapools_json"
 	    else
-	        if [ $verbose -ge 1 ]; then
+		if [ $verbose -ge 1 ]; then
-	            printf "${RED}Error:${MAGENTA} Can't update DefaultRetensinDays ${GREEN}'%s'${MAGENTA} in media-pool file ${GREEN}'%s'${NO_COLOR}\n" \
+		    printf "${RED}Error:${MAGENTA} Can't update DefaultRetensinDays ${GREEN}'%s'${MAGENTA} in media-pool file ${GREEN}'%s'${NO_COLOR}\n" \
-		           "$mediapool_defaultretensiondays" "$mediapools_json"
+			   "$mediapool_defaultretensiondays" "$mediapools_json"
-	        fi
+		fi
 		return 1
 	    fi
 	else
@@ -2138,7 +2140,7 @@ update_retensiondate () {
 	if [ $? -eq 0 ]; then
 	    cmd="jq --monochrome-output --ascii-output '(.MediaPool[] \
 		| select(.Name == \"$mediapool_name\") \
-	    	| .Member[$tape_index] \
+		| .Member[$tape_index] \
 		| .RetensionDate) \
 		|= \"$volume_retensiondate\" ' \
 		${mediapools_json} > $XDG_RUNTIME_DIR/$json_file"
@@ -2146,10 +2148,10 @@ update_retensiondate () {
 	    if [ $? -eq 0 ]; then
 		cp "$XDG_RUNTIME_DIR/$json_file" "$mediapools_json"
 	    else
-	        if [ $verbose -ge 1 ]; then
+		if [ $verbose -ge 1 ]; then
-	            printf "${RED}Error:${MAGENTA} Can't update RetensionDate ${GREEN}'%s'${MAGENTA} for Tape ${GREEN}'%s'${NO_COLOR}\n" \
+		    printf "${RED}Error:${MAGENTA} Can't update RetensionDate ${GREEN}'%s'${MAGENTA} for Tape ${GREEN}'%s'${NO_COLOR}\n" \
-		           "$volume_retensiondate" "$volume_name"
+			   "$volume_retensiondate" "$volume_name"
-	        fi
+		fi
 		return 1
 	    fi
 	else
@@ -2171,62 +2173,62 @@ Usage: $progname [options]
 
 Options:
      --add-retensiondays    add RetensionDays to LastWrite attribute for given TapeName in Pool (JSON-File)
-                            (input attribute: <mediapool> <volume_name> <days>)
+			    (input attribute: <mediapool> <volume_name> <days>)
      --color                Enable colored output messages
      --get-lastwrite        extract LastWrite attribute from given Pool member (JSON-File)
-                            (input attribute: <mediapool> [<volume_name>])
+			    (input attribute: <mediapool> [<volume_name>])
-                            without given volume_name, extract Pool member that was last witten to
+			    without given volume_name, extract Pool member that was last witten to
      --get-mediapool-name   extract MediaPool name for given VolumeName from configuration (JSON-File)
-                            (input attribute: <volume_name>)
+			    (input attribute: <volume_name>)
      --get-mediapools       extract MediaPool names from configuration (JSON-File)
      --get-mediapolicy      extract MediaPolicy attribute from Pool configuration (JSON-File)
-                            (input attribute: <mediapool> [<volume_name>])
+			    (input attribute: <mediapool> [<volume_name>])
      --get-poolmember       extract VolumeName attribute from Pool configuration (JSON-File)
-                            (input attribute: <mediapool> [<volume_name>])
+			    (input attribute: <mediapool> [<volume_name>])
      --get-poolmember-next  extract VolumeName for next usable Pool member (JSON-File)
-                            (input attribute: <mediapool> [volume_name])
+			    (input attribute: <mediapool> [volume_name])
      --get-retensiondate    extract RetensionDate attribute from Pool configuration (JSON-File)
-                            (input attribute: <mediapool> [<volume_name>])
+			    (input attribute: <mediapool> [<volume_name>])
      --get-retensiondays    extract DefaultRetensionDays attribute from Pool configuration (JSON-File)
-                            (input attribute: <mediapool>)
+			    (input attribute: <mediapool>)
      --get-slot             extract Slot attribute from Pool configuration (JSON-File)
-                            (input attribute: <mediapool> [<volume_name>])
+			    (input attribute: <mediapool> [<volume_name>])
      --ltfs-getattribute    report ltfs extended attribute for mounted tape
-                            (input attribute: <ltfs_attribute>)
+			    (input attribute: <ltfs_attribute>)
      --ltfs-format          format tape
-                            (input attribute: <volume_name> <tape_id>)
+			    (input attribute: <volume_name> <tape_id>)
      --ltfs-is-mounted      returns true, if ltfs tape is already mounted
      --ltfs-mount           mount a ltfs tape (returns true on success)
      --ltfs-reformat        reformat mounted tape
-                            (input attribute: [<volume_name>])
+			    (input attribute: [<volume_name>])
      --ltfs-umount          unmount a ltfs tape (returns true on success)
      --media-change         Update RetensionDate for last written Pool-Tape and  und exchange tapes in slots
-                            (input attribute: <mediapool> [<volume_name>])
+			    (input attribute: <mediapool> [<volume_name>])
      --mtx-exchange         exchange tapes in slots
-                            (input attribute: <slot_source> <slot_target>)
+			    (input attribute: <slot_source> <slot_target>)
      --mtx-getlabel         report tape label/barcode for tape in drive
-                            (input attribute: <slot_source>)
+			    (input attribute: <slot_source>)
      --mtx-inventory        run inquriy task for tape-changer
      --mtx-load             load a tape to target slot
-                            (input attribute: <slot_source>)
+			    (input attribute: <slot_source>)
      --mtx-status           list changer slot status
      --mtx-transfer         transfer a tape to target slot
-                            (input attribute: <slot_source> <slot_target>)
+			    (input attribute: <slot_source> <slot_target>)
      --mtx-unload           unload a tape
-                            (input attribute: slot_source drive)
+			    (input attribute: slot_source drive)
      --mount                make tape accessible for OS
-                            (input attribute: <mediapool_name> [<volume_name>])
+			    (input attribute: <mediapool_name> [<volume_name>])
      -q, --quiet            Be quiet
      --update-lastwrite     update LastWrite attribute for given TapeName in Pool (JSON-File)
-                            if no datestring is specified, use "now"
+			    if no datestring is specified, use "now"
 			    (input attribute: <mediapool> <volume_name> [<YYYYMMDDHHMMSS> )
      --update-retensiondate update RetensionDate attribute for given TapeName in Pool (JSON-File)
-                            if no datestring is specified, use "now"
+			    if no datestring is specified, use "now"
 			    (input attribute: <mediapool> <volume_name> [<YYYYMMDDHHMMSS> )
      --update-retensiondays update DefaultRetensionDays attribute for given Pool (JSON-File)
-                            (input attribute: <mediapool>)
+			    (input attribute: <mediapool>)
      --use-mtx              use mtx loader handling. If not specified, all mtx commands will use
-                            default device ($default_changer_device)
+			    default device ($default_changer_device)
      -v, --verbose          Be verbose on what's going on (min: --verbose=1, max: --verbose=3)
      --version		    show program version
 EOF
@@ -2273,7 +2275,7 @@ case $cmd in
 		       "${volume_name}" "${volume_date}"
 	    fi
 	fi
-    	;;
+	;;
     get-lastwrite)
 	valid_member=0
 	get_lastwrite "${mediapool_name}" "${volume_name}"
@@ -2289,7 +2291,7 @@ case $cmd in
 		fi
 	    fi
 	fi
-    	;;
+	;;
     get-mediapolicy)
 	get_mediapolicy "${mediapool_name}" "${volume_name}"
 	if test $? -gt 0; then
@@ -2300,7 +2302,7 @@ case $cmd in
 		       "${volume_name}" "${volume_mediapolicy}"
 	    fi
 	fi
-    	;;
+	;;
     get-mediapool-name)
 	get_mediapool_name "${volume_name}"
 	if test $? -gt 0; then
@@ -2311,7 +2313,7 @@ case $cmd in
 		       "${mediapool_name}"
 	    fi
 	fi
-    	;;
+	;;
     get-mediapools)
 	get_mediapool_names
 	if test $? -gt 0; then
@@ -2322,7 +2324,7 @@ case $cmd in
 		       "${mediapool_names}"
 	    fi
 	fi
-    	;;
+	;;
     get-poolmember)
 	valid_member=0
 	get_poolmember "${mediapool_name}" "${volume_name}"
@@ -2335,7 +2337,7 @@ case $cmd in
 	    fi
 	    valid_member=1
 	fi
-    	;;
+	;;
     get-poolmember-next)
 	valid_member=0
 	get_poolmember_next "${mediapool_name}" "${volume_name}"
@@ -2347,7 +2349,7 @@ case $cmd in
 		       "${mediapool_name}" "${volume_name_next}"
 	    fi
 	fi
-    	;;
+	;;
     get-mediapool-retensiondays)
 	get_mediapool_retensiondays "${mediapool_name}"
 	if test $? -gt 0; then
@@ -2358,7 +2360,7 @@ case $cmd in
 		       "${mediapool_name}" "${mediapool_defaultretensiondays}"
 	    fi
 	fi
-    	;;
+	;;
     get-retensiondate)
 	get_retensiondate "${mediapool_name}" "${volume_name}"
 	if test $? -gt 0; then
@@ -2371,7 +2373,7 @@ case $cmd in
 		       "${volume_name}" "${volume_date}"
 	    fi
 	fi
-    	;;
+	;;
     get-slot)
 	get_slot "${mediapool_name}" "${volume_name}"
 	if test $? -eq 0; then
@@ -2381,7 +2383,7 @@ case $cmd in
 	    fi
 	fi
 	exit $?
-    	;;
+	;;
     ltfs-format)
 	ltfs_format "${volume_name}" "${tape_id}"
 	if test $? -gt 0; then
@@ -2405,78 +2407,72 @@ case $cmd in
 	fi
 	;;
     ltfs-is-mounted)
+	if ! $quiet; then
+	    printf "${MAGENTA}LTFS tape mount checke\n"
+	fi
 	ltfs_is_mounted
 	if test $? -gt 0; then
 	    exit 1
-	else
-	    if ! $quiet; then
-		printf "${MAGENTA}LTFS Tape is-mounted: ${GREEN}true${NO_COLOR}\n"
-	    fi
 	fi
 	;;
     ltfs-mount)
+	if ! $quiet; then
+	    printf "${MAGENTA}LTFS mount Tape\n"
+	fi
 	ltfs_mount
 	if test $? -gt 0; then
 	    exit 1
-	else
-	    if ! $quiet; then
-		printf "${MAGENTA}LTFS Tape mount: ${GREEN}true${NO_COLOR}\n"
-	    fi
 	fi
        ;;
     ltfs-reformat)
+	if ! $quiet; then
+	    printf "${MAGENTA}LTFS Tape reformat: ${GREEN}%s${NO_COLOR}\n" \
+		   "${volume_name}"
+	fi
 	ltfs_reformat "${volume_name}"
 	if test $? -gt 0; then
 	    return 1
-	else
-	    if ! $quiet; then
-		printf "${MAGENTA}LTFS Tape reformat: ${GREEN}%s${NO_COLOR}\n" \
-		       "${volume_name}"
-	    fi
 	fi
 	;;
     ltfs-umount)
+	if ! $quiet; then
+	    printf "${MAGENTA}LTFS Tape unmount: ${GREEN}true${NO_COLOR}\n"
+	fi
 	ltfs_umount
 	if test $? -gt 0; then
 	    exit 1
-	else
-	    if ! $quiet; then
-		printf "${MAGENTA}LTFS Tape unmount: ${GREEN}true${NO_COLOR}\n"
-	    fi
 	fi
 	;;
     media-change)
+	if ! $quiet; then
+	    if  [ ${#volume_name} -ge 1 ]; then
+		printf "${MAGENTA}Media change in pool: ${GREEN}%s${NO_COLOR} (Volume-Name: ${GREEN}%s${NO_COLOR})\n" \
+		       "${mediapool_name}" "${volume_name}"
+	    else
+		printf "${MAGENTA}Media change in pool: ${GREEN}%s${NO_COLOR}\n" \
+		       "${mediapool_name}"
+	    fi
+	fi
 	media_change $mediapool_name $volume_name
 	if test $? -gt 0; then
 	    return 1
-	else
-	    if ! $quiet; then
-		if  [ ${#volume_name} -ge 1 ]; then
-		    printf "${MAGENTA}Media changed in pool: ${GREEN}%s${NO_COLOR} (Volume-Name: ${GREEN}%s${NO_COLOR})\n" \
-			   "${mediapool_name}" "${volume_name}"
-		else
-		    printf "${MAGENTA}Media changed in pool: ${GREEN}%s${NO_COLOR}\n" \
-			   "${mediapool_name}"
-		fi
-	    fi
 	fi
 	;;
     mount)
-        mount_tape "${mediapool_name}" "${volume_name}"
+	if ! $quiet; then
-	if test $? -gt 0; then
+	    if test ${#volume_name} -ge 1; then
-	    exit 1
+		printf "${MAGENTA}Mount tape ${GREEN}'%s'${MAGENTA} for ${GREEN}'%s'${NO_COLOR}\n" \
-	else
+		       "${volume_name}" "${mediapool_name}"
-	    if ! $quiet; then
+	    else
-		if test ${#volume_name} -ge 1; then
+		printf "${MAGENTA}Mount next tape for mediapool ${GREEN}'%s'${NO_COLOR}\n" \
-		    printf "${MAGENTA}Tape ${GREEN}'%s'${MAGENTA} for ${GREEN}'%s'${MAGENTA} mounted${NO_COLOR}\n" \
+		       "${mediapool_name}"
-			   "${volume_name}" "${mediapool_name}"
-		else
-		    printf "${MAGENTA}Next tape for mediapool ${GREEN}'%s'${MAGENTA} mounted${NO_COLOR}\n" \
-			   "${mediapool_name}"
-		fi
 	    fi
 	fi
-    	;;
+	mount_tape "${mediapool_name}" "${volume_name}"
+	if test $? -gt 0; then
+	    exit 1
+	fi
+	;;
     mtx-exchange)
 	mtx_exchange "${slot_source}" "${slot_target}"
 	exit $?
@@ -2519,7 +2515,7 @@ case $cmd in
 		fi
 	    fi
 	fi
-    	;;
+	;;
     update-mediapool-retensiondays)
 	update_mediapool_retensiondays "${mediapool_name}" "${mediapool_defaultretensiondays}"
 	if test $? -gt 0; then
@@ -2530,7 +2526,7 @@ case $cmd in
 		       "${mediapool_name}" "${mediapool_defaultretensiondays}"
 	    fi
 	fi
-    	;;
+	;;
     update-retensiondate)
 	update_retensiondate "${mediapool_name}" "${volume_name}" "${date_string}"
 	if test $? -gt 0; then
@@ -2545,5 +2541,5 @@ case $cmd in
 		fi
 	    fi
 	fi
-    	;;
+	;;
 esac

lang/german/README.md

@@ -3,6 +3,13 @@
 
 # dsnap-sync
 
+<p align="center">
+  <span>English</span> |
+  <a href="../..">Englisch</a>
+  <!-- a href="../spanish">Spanisch</a> | -->
+  <a href="lang/german">Deutsch</a>
+</p>
+
 ## Über
 
 `dsnap-sync` ist konzipiert, um Backups für btrfs formatierte Dateisysteme
@@ -138,17 +145,17 @@ Folgende Tools werden verwendet:
 erforderlich. Über ein Makefile wird die Installation an den
 richtigen Ziel-Pfad gesteuert.
 
-    # make install
+	# make install
 
 Sollte Ihr System einen unüblichen Speicherort für die snapper
 Konfigurationen verwenden, kann der Pfad in einer Umgebungs-Variable
 für die Installation einbezogen werden (`SNAPPER_CONFIG`).
 
-    Arch Linux/Fedora/Gentoo:
+	Arch Linux/Fedora/Gentoo:
-    # make SNAPPER_CONFIG=/etc/conf.d/snapper install
+	# make SNAPPER_CONFIG=/etc/conf.d/snapper install
 
-    Debian/Ubuntu:
+	Debian/Ubuntu:
-    # make SNAPPER_CONFIG=/etc/default/snapper install
+	# make SNAPPER_CONFIG=/etc/default/snapper install
 
 Die lokalen `snapper` Konfiguration werden um ein neues Template
 'dsnap-sync' ergänzt.
@@ -172,41 +179,41 @@ Software Paket Manager.
 
 ## Optionen
 
-    Usage: dsnap-sync [options]
+	Usage: dsnap-sync [options]
 
-      Options:
+	  Options:
-      -a, --automount <path>      start automount for given path to get a valid target mountpoint.
+	  -a, --automount <path>      start automount for given path to get a valid target mountpoint.
-      -b, --backupdir <prefix>    backupdir is a relative path that will be appended to target backup-root
+	  -b, --backupdir <prefix>    backupdir is a relative path that will be appended to target backup-root
-          --backuptype <type>     Specify backup type <archive | child | parent>
+		  --backuptype <type>     Specify backup type <archive | child | parent>
-	      --batch                 no user interaction
+		  --batch                 no user interaction
-      -d, --description <desc>    Change the snapper description. Default: "latest incremental backup"
+	  -d, --description <desc>    Change the snapper description. Default: "latest incremental backup"
-          --label-finished <desc> snapper description tagging successful jobs. Default: "dsnap-sync backup"
+		  --label-finished <desc> snapper description tagging successful jobs. Default: "dsnap-sync backup"
-          --label-running <desc>  snapper description tagging active jobs. Default: "dsnap-sync in progress"
+		  --label-running <desc>  snapper description tagging active jobs. Default: "dsnap-sync in progress"
-          --label-synced <desc>   snapper description tagging last synced jobs.
+		  --label-synced <desc>   snapper description tagging last synced jobs.
-                                  Default: "dsnap-sync last incremental"
+								  Default: "dsnap-sync last incremental"
-          --color                 Enable colored output messages
+		  --color                 Enable colored output messages
-      -c, --config <config>       Specify the snapper configuration to use. Otherwise will perform for each snapper
+	  -c, --config <config>       Specify the snapper configuration to use. Otherwise will perform for each snapper
-                                  configuration. You can select multiple configurations
+								  configuration. You can select multiple configurations
-                                  (e.g. -c "root" -c "home"; --config root --config home)
+								  (e.g. -c "root" -c "home"; --config root --config home)
-          --config-postfix <name> Specify a postfix that will be appended to the destination snapper config name.
+		  --config-postfix <name> Specify a postfix that will be appended to the destination snapper config name.
-          --dry-run               perform a trial run (no changes are written).
+		  --dry-run               perform a trial run (no changes are written).
-          --mediapool             Specify the name of the tape MediaPool
+		  --mediapool             Specify the name of the tape MediaPool
-      -n, --noconfirm             Do not ask for confirmation for each configuration. Will still prompt for backup
+	  -n, --noconfirm             Do not ask for confirmation for each configuration. Will still prompt for backup
-          --nonotify              Disable graphical notification (via dbus)
+		  --nonotify              Disable graphical notification (via dbus)
-          --nopv                  Disable graphical progress output (disable pv)
+		  --nopv                  Disable graphical progress output (disable pv)
-          --noionice              Disable setting of I/O class and priority options on target
+		  --noionice              Disable setting of I/O class and priority options on target
-      -r, --remote <address>      Send the snapshot backup to a remote machine. The snapshot will be sent via ssh
+	  -r, --remote <address>      Send the snapshot backup to a remote machine. The snapshot will be sent via ssh
-                                  You should specify the remote machine's hostname or ip address. The 'root' user
+								  You should specify the remote machine's hostname or ip address. The 'root' user
-                                  must be permitted to login on the remote machine
+								  must be permitted to login on the remote machine
-      -p, --port <port>           The remote port
+	  -p, --port <port>           The remote port
-      -s, --subvolid <subvlid>    Specify the subvolume id of the mounted BTRFS subvolume to back up to. Defaults to 5.
+	  -s, --subvolid <subvlid>    Specify the subvolume id of the mounted BTRFS subvolume to back up to. Defaults to 5.
-	      --use-btrfs-quota       use btrfs-quota to calculate snapshot size
+		  --use-btrfs-quota       use btrfs-quota to calculate snapshot size
-      -u, --uuid <UUID>           Specify the UUID of the mounted BTRFS subvolume to back up to. Otherwise will prompt
+	  -u, --uuid <UUID>           Specify the UUID of the mounted BTRFS subvolume to back up to. Otherwise will prompt
-                                  If multiple mount points are found with the same UUID, will prompt for user selection
+								  If multiple mount points are found with the same UUID, will prompt for user selection
-      -t, --target <target>       Specify the mountpoint of the backup device
+	  -t, --target <target>       Specify the mountpoint of the backup device
-          --volumename            Specify the name of the tape volume
+		  --volumename            Specify the name of the tape volume
-      -v, --verbose               Be verbose on what's going on (min: --verbose=1, max: --verbose=3)
+	  -v, --verbose               Be verbose on what's going on (min: --verbose=1, max: --verbose=3)
-          --version		          show program version
+		  --version		show program version
 
 ## Erster Sicherungslauf
 
@@ -264,7 +271,7 @@ sorgen. Folgende Sicherungstypen werden unterschieden:
   * ein Unterverzeichnis des Konfigurations-Namens (`archive-<config-name>`)
   * ein Unterverzeichnis der Snapshot-ID (`<snapper-id>`)
   * der aktuelle btrfs Stream wird im Unterverzeichnis abgelegt
-    (`<snapper-id>_[full | incremental].btrfs`)
+	(`<snapper-id>_[full | incremental].btrfs`)
   * die Metadaten des Prozesses werden in der Datei `info.xml` abgelegt
 
   Steht `ltfs` zur Verfügung, ist ein Backup auf Bänder möglich.
@@ -357,4 +364,4 @@ Diese Arbeit ist unter der [Creative Common License 4.0][License-CC_BY] lizensie
 ![Creative Common Logo][Logo-CC_BY]
 
 © 2016, 2017  James W. Barnett;
-© 2017 - 2018 Ralf Zerres
+© 2017 - 2019 Ralf Zerres