Re: [Bacula-users] Problem copying jobs

Hi,

06.03.2010 18:46, Peter Allgeyer wrote:
> Hi Arno!
> 
> Am Samstag, den 06.03.2010, 14:00 +0100 schrieb Arno Lehmann:
> 
>> I'm guessing that you're running an USB or (less likely, but still 
>> possible) FireWire external disk. If that's the case, you probably 
>> struck a bad USB-to-(S)ATA controller.
> 
> Harddisk is FC attached.

Hmm. That should never cause any such errors, which seems to point at 
a higher level as the cause of this problem. Makes me think that even 
Bacula itself might be the cause.

>> If you see this with internal hard disk, I'd recommend to check for 
>> bad disk blocks, and check the drive's SMART status using smartctl.
> 
> Will check the drive. Haven't had any such problems when I set "Maximum
> Volume Files = 1". But this prevents parallel jobs. Don't know, if the
> upgrade to 5.0.1 is the cause, but think it's unlikely, because I've
> read about the same error in old mails.

I doubt that it's related to 5.0.1 - I've myself seen this error with 
versions as early as somewhere between 3.0.3 and 3.1.x (when I started 
using external hard disks). I know of those problems longer, though - 
and, as far as I can tell, it only happens with FireWire or USB disks. 
I would consider FC (or rather, the software stack built upon it) more 
like classical SCSI, i.e. much more robust than the whole USB/FW 
stuff, so I'm astonished seeing it happen with FC connected disks.

Unfortunately, I don't know if you'll be able to learn anything useful 
from smartctl or badblocks if you're running more than a single FC 
disk... anything in a managed storage system should behave error-free 
to the outside, and do all error handling and -correction internally.

Good luck analyzing anyway, and if you find reasons to believe this is 
really Bacula-related I'd be glad to see the bug report and eventual 
fix :-)

Cheers,

Arno

> Best regards,
>  P. Allgeyer
> 

-- 
Arno Lehmann
IT-Service Lehmann
Sandstr. 6, 49080 Osnabrück
www.its-lehmann.de

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