Re: [Bacula-users] simple (?) mount/unmount of USB storage device

[Cedric T. <log...@gm...>]

Michael FIG wrote:
> Hi,
>
> I'm a long-term Bacula user, having used it for file and DVD volume
> backups in the past.  I'm scratching my head over what seems like a
> really simple requirement, but I can't for the life of me figure it
> out right now.
>
> I have a large external USB drive on which I want to write file
> volumes, by mounting it as /var/lib/bacula/media
>
> I have everything working to create and rotate files in the
> /var/lib/bacula/media directory, but I want to leave the drive
> unmounted (and thereby less liable to corruption) as often as
> possible, so that bacula-sd "mount"s it as /var/lib/bacula/media to do
> the backup, and "umount"s it when the backup is finished.
>
> I've been messing around with the autochanger scripts, but just don't
> understand them enough to put something this simple together.
>
> Anybody out there have a suggestion for what to do?
>
> Thanks,
>
>   
An autochanger config is probably overkill.  You can implement autofs as 
John already suggested, or you can use the "Mount Command", "Unmount 
Command" (et. al.) directives in your Device resource:

http://www.bacula.org/3.0.x-manuals/en/install/install/Storage_Daemon_Configuratio.html#SECTION00830000000000000000

Mine looks like this:

Device {
  Name = BackupDrive
  Media Type = File
  Archive Device = /media/backup/volumes
  Mount Point = /media/backup
  Mount Command = "/bin/mount %m"
  Unmount Command = "/bin/umount %m"
  Requires Mount = yes
  LabelMedia = yes
  Random Access = Yes
  AutomaticMount = yes
  RemovableMedia = yes
  AlwaysOpen = no
  Offline On Unmount = Yes
}

Note that there is a bug in 3.0.2 that prevents Bacula from calling the 
unmount command for file resources.  It's fixed in the git repository, 
but I don't know if the fix made it into 3.0.3.

- Cedric