A quick test of this scenario seems to work.
Leaving "Prefer Mounted Volumes = yes" (default).
Setting both drives in autochanger to have 1/2 of the the total 
concurrently limit.  This per device setting seems to allow for multiple 
drives using the same Pool.

Not very well documented IMHO.

Stephen





-------- Original Message --------
Return-Path:    <bob_hetzel AT hotmail DOT com>





Are you using the setting:

prefer mounted volumes=yes or no
?

If you had it set to yes, then you'd never use the 2nd tape drive, but
if you set it to no, sometimes you'd hit a deadlock.

I used to have an environment with more than a hundred daily jobs and
would hit a contention issue occasionally.  The developers eventually
abandoned that code in favor of setting the maximum concurrent jobs per
device

http://www.bacula.org/5.2.x-manuals/en/main/main/New_Features_in_5_0_0.html#SECTION00910000000000000000


In addition, another problem I hit occasionally would appear after
upgrading the OS.  If you update your system you may need to rebuild
bacula.  Before I started rebuilding bacula at the end of system updates
I would hit race conditions and process crashes.

      Bob




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