Re: [Bacula-users] Restore issue?

[Jason A. K. <ja...@ka...>]

This is a tape volume with 29 jobs on it with a retention period of 12
months.

llist volume=AX7321L4
          MediaId: 176
       VolumeName: AX7321L4
             Slot: 45
           PoolId: 2
        MediaType: LTO-3
     FirstWritten: 2009-04-04 06:06:49
      LastWritten: 2009-04-25 00:18:29
        LabelDate: 2009-04-04 06:06:49
          VolJobs: 28
         VolFiles: 1,458
        VolBlocks: 1,386,698
        VolMounts: 7
         VolBytes: 1,454,042,716,160
        VolErrors: 0
        VolWrites: 2,609,155
 VolCapacityBytes: 0
        VolStatus: Full
          Enabled: 1
          Recycle: 1
     VolRetention: 31,104,000
   VolUseDuration: 0
       MaxVolJobs: 0
      MaxVolFiles: 0
      MaxVolBytes: 0
        InChanger: 1
          EndFile: 337
         EndBlock: 879
         VolParts: 0
        LabelType: 0
        StorageId: 5
         DeviceId: 0
       LocationId: 0
     RecycleCount: 1
     InitialWrite: 0000-00-00 00:00:00
    ScratchPoolId: 0
    RecyclePoolId: 0
          Comment: NULL


On Fri, 2009-05-29 at 09:21 +0100, Graham Keeling wrote:
> On Fri, May 29, 2009 at 12:13:02AM -0400, Jason A. Kates wrote:
> ...
> > 28-May 20:32 backup-server-sd JobId 67400: Error: block.c:275 Volume
> > data error at 339:441! Wanted ID: "BB02", got "". Buffer discarded.
> ...
> 
> I used to get this error on restore if I had the 'autopurge corruption bug'.
> 
> More information starts here (or you can google for it if the links are
> now broken):
> http://www.mail-archive.com/bac...@li.../msg34768.html
> 
> Basically:
> a) a bacula job starts writing to a volume,
> b) a second job starts and because the first job doesn't set up things in the
> database correctly until the job has finished, or 1gb has been backed up...
> c) ...the second job purges the volume and starts writing to it.
> d) both jobs report success.
> 
> So, you end up with corrupted data.
> 
> If I remember correctly, it only happens if you have it set up so that a volume
> has a maximum of one job, and the jobs that you are running overlap.
> If you are using bacula-3.0.0 or newer, this problem should be fixed.
> 
> 
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Jason A. Kates (ja...@ka...) 
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