On Tue, 2011-11-08 at 10:17 +1100, James Harper wrote: > > Are there any other messages in the event logs about the vss snapshot > process? >
I didn't see anything else significant, but I will look again in a few hours. > What you describe would indicate that the problem is Windows rather than > Bacula. Can you try the following suggestions, in no particular order: > > While the backup is running, does the command 'vssadmin list writers' > show any writers with errors? The way Bacula uses VSS is fairly > simplistic and doesn't involve the writers, but it does give a 'crash > consistent' copy of the drive. A writer in an error status would be an > indication of a problem though. Didn't notice any, but will retest. > Is the MySQL very heavily used? VSS likes to try and find a period of > 'idle time' to do its work. Whatever happens, the outcome should never > be a corrupt snapshot but maybe you've discovered a bug. Is it possible > to make MySQL idle (or stop it altogether but ideally you'd test with > the files still in use) and see if the problem persists? Most of our backups are of VMs, so we cloned a production machine for our test and put it on its own VLAN. With no outside traffic, the database should be pretty quiet. I do not have the DB password to flush_tables_with_read_lock, but I should be able to stop the DB. > Do a chkdsk /f on the drive where the database is. Probably best to do > it on reboot rather than force a dismount of the drive. Obviously the > volume is working well enough but there could be some latent corruption > or something that only comes out in the snapshot. Already tried this one. > Create a snapshot manually. This guy blogs about how to do it > http://blogs.msdn.com/b/adioltean/archive/2005/01/20/357836.aspx and map > it to a drive letter. The vshadow tool that he talks about is part of > the VSS SDK... newer versions are available but I assume this version > http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=2349 > 0 might do the trick on 2003. Once you've created the snapshot, see if > you can access the files just by copying them to somewhere else. At > least then you'll know if you have a general VSS problem or if it is > specific to Bacula. Definitely a promising approach. I will let you know what I find. > Good luck! > > James -- Regards, Avery Ceo Systems Administrator Enterprise Hosting ------------------------------------------------------------------------------ RSA(R) Conference 2012 Save $700 by Nov 18 Register now http://p.sf.net/sfu/rsa-sfdev2dev1 _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
