can be excluded from the backup (and thus this requirement).
// see PVE::VZDump::LXC::prepare()
-NOTE: By default additional mount points besides the RootDisk mount point are
+NOTE: By default additional mount points besides the Root Disk mount point are
not included in backups. For volume mount points you can set the *Backup* option
to include the mount point in the backup. Device and bind mounts are never
backed up as their content is managed outside the {pve} storage library.