On 10/29/2011 10:06 AM, S?bastien WENSKE wrote:
> Hi List !
>
> Does someone knows why "sometimes" Bacula marks Volumes in Error when it
> can't load a Virtual Tape (a file) because it's already use by another
> Virtual Device in the Virtual AutoChanger ? I specified " Prefer Mounted
> Volumes = no" in the JobDefs

The programmers have added a different option for trying to use multiple 
drives in the same pool.  Instead of using "Prefer mounted volumes = no" 
you should "Maximum Concurrent Jobs " per device a try

http://www.bacula.org/5.0.x-manuals/en/main/main/New_Features_in_5_0_0.html#SECTION00510000000000000000

I've been running with this newer config for more than a year now with much 
improved results.  I used to get race conditions that would cause bacula to 
crash using prefer mounted volumes=no and concurrently running 10-15 jobs 
concurrently on two drives.  Also, I believe Kern said that was an 
"unsupported" configuration a while back, but they do intend to fix any 
bugs found in the "Maximum Concurrent Jobs " per device code.

    Bob

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