Dear all,

We recently bought two identical HP Ultrium 448i tape drives.  We want
to use them with Bacula and found the white paper "Best Practices for
Disk Backup" [1] that describes how to configure a virtual autochanger.
 We applied the necessary changes in order to model our two drives
combined in one virtual autochanger and tried it with a backup job that
needs more than one tape.

Bacula used the first tape as expected but when in came to use the
second tape it requested the second tape to be mounted in the first
drive although the tape was correctly mounted in the second drive.

Now I would like to ask the experts if it is possible to make a setup
like I described work and if so, what we did wrong so far.  We are
currently using bacula 5.2.6 from Debian stable (8.0 aka jessie).  So
far we have been using bacula with one drive for the past 10 years or so
and did not have any problems.

Here are the relevant portions of our configs:

<bacula-dir.conf>

Storage {
  Name = TapeChanger
  Address = 127.0.0.1
  Password = "03292ab58a34fc3895a70a0d6581581c6105a5fd"
  Device = Virtual
  Media Type = Ultrium2
  Autochanger = yes
}

JobDefs {
  Name = "DefaultJob"
  Type = Backup
  Client = hamster-file
  FileSet = HomeBackupFileSet
  Messages = Standard
  Storage = TapeChanger
  Priority = 10
}

Job {
  Name = "BackupFiles"
  JobDefs = DefaultJob
  Schedule = DailySchedule
  Pool = WeeklyPool
  Write Bootstrap = "/var/lib/bacula/BackupFiles.bsr"
}

</bacula-dir.conf>

<bacula-sd.conf>

Autochanger {
  Name = Virtual
  Changer Device = /dev/null
  Changer Command = ""
  Device = virtual-0, virtual-1
}

Device {
  Name = virtual-0
  Media Type = Ultrium2
  Archive Device = /dev/nst0
  Device Type = Tape
  AutomaticMount = yes
  AlwaysOpen = yes
  RemovableMedia = yes
  Autochanger = yes
  Drive Index = 0
  Volume Poll Interval = 15
  Autoselect = yes
}

Device {
  Name = virtual-1
  Media Type = Ultrium2
  Archive Device = /dev/nst1
  Device Type = Tape
  AutomaticMount = yes
  AlwaysOpen = yes
  RemovableMedia = yes
  Autochanger = yes
  Drive Index = 1
  Volume Poll Interval = 15
  Autoselect = yes
}

</bacula-sd.conf>


Thanks for any input on this matter!

[1]  http://blog.bacula.org/whitepapers/CommunityDiskBackup.pdf

Cheers,

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