NetWorker 8.2 SP4 supports backups of B-tree file systems (BTRFS).
When a server-initiated backup starts, only BTRFS sub-volumes that are configured in
the /etc/vfstab file are backed up. When NetWorker encounters a subdirectory
that has a sub-volume ID that differs from the parent sub-volume ID, NetWorker does
not back up the contents of the subdirectory, unless you specify the save -x
command in the Backup command field in the properties of the Client resource.
When you specify a BTRFS volume or sub-volume save set during a manual backup,
NetWorker performs a recursive back up of the directory tree that you specified with
the save command. When NetWorker encounters a subdirectory that has a subvolume
ID that differs from the parent sub-volume ID, NetWorker does not back up
the contents of the subdirectory, unless you specify the -x option with the save
command.