What version of Bacula are you running?
Are you running with PreferMountedVolumes=no?
If you are running 5.0.0, would you please try 5.0.1 and report back if you
have the same problem.
Best regards,
Kern
On Wednesday 03 March 2010 05:26:44 Joseph Dickson wrote:
> Greetings..
>
> I've been having a concurrency problem with my fully disk-based autochanger
> setup, which is resulting in volumes being marked as Error status
> erroneously. As near as I can tell, the situation which leads up to this
> is:
>
> 1: the volume that is decided upon is already loaded in a different drive
> than has been assigned to the job 2: multiple jobs are running competing
> for volumes within the same pool 3: Maximum Concurrent Jobs is set to 1 on
> each Device entry
>
> In digging through the code, it looks like vol_mgr.c has some special case
> code to deal with the case where a volume is being swapped from one drive
> to the other. However, it looks to me like the code that allows all that
> to happen (namely, keeping the volume in the vol_list even after
> volume_unused is called, so that the code in reserve_volume can detect that
> the volume is already loaded in a drive in the changer) is specifically
> disabled for disk devices:
>
> vol_mgr.c in volume_unused at around line # 587:
>
> /*
> * If this is a tape, we do not free the volume, rather we wait
> * until the autoloader unloads it, or until another tape is
> * explicitly read in this drive. This allows the SD to remember
> * where the tapes are or last were.
> */
> Dmsg4(dbglvl, "=== set not reserved vol=%s num_writers=%d
> dev_reserved=%d dev=%s\n", dev->vol->vol_name, dev->num_writers,
> dev->num_reserved(), dev->print_name()); Dmsg1(dbglvl, "=== clear in_use
> vol=%s\n", dev->vol->vol_name); dev->vol->clear_in_use();
> if (dev->is_tape() || dev->is_autochanger()) {
> return true;
> } else {
> /*
> * Note, this frees the volume reservation entry, but the
> * file descriptor remains open with the OS.
> */
> return free_volume(dev);
> }
>
> It seems to me (and my admittedly extremely shallow understanding of the
> code so far) that either this code should be changed to treat disk volumes
> the same, OR code should be added to unload a disk based autochanger drive
> when the volume is done being used.
>
> Please forgive me if I'm way off base.. just trying to track down the cause
> of my problem :( A (rather length) trace output of a series of jobs which
> illustrates the problem I'm having can be found at:
> http://pastebin.com/raw.php?i=Ne0XJbBh
>
> Any thoughts or ideas on where to keep looking?
>
> Cheers,
>
> Joe
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