Hi,

19.12.2007 14:25,, Henry Jensen wrote::
> Hello,
> 
> Since a few days I get "Block checksum mismatch" errors when trying to 
> restore.
> I run bacula nearly a year now, I have done successfull restore jobs before.
> btape test completes successfull.
> 
> 
> Errors looks like this:
> 19-Dec 08:29 bs1-sd JobId 3242: Error: block.c:318 Volume data error at 
> 33:9495!
> Block checksum mismatch in block=9495 len=64512: calc=88d085a3 blk=cb1338f1
> 
> Next try:
> 19-Dec 11:33 bs1-sd JobId 3245: Error: block.c:318 Volume data error at 
> 33:9495!
> Block checksum mismatch in block=9495 len=64512: calc=5218e505 blk=cb1338f1
> 
> Sometimes the error is on the same block, but with other calc value, another 
> time
> I get the errors at a complete different block.

So it seems to be a problem reading the tapes, not with wrong data on 
tape.

> The error appears with new tapes and with tapes being in use some month now.
> And yes, I have cleaned the drive with the cleaning tape.
 >
> I'm using bacula 2.2.5 (debian-backports packages) on Debian Etch
> Tape drive is a SONY SDX-700C in an autochanger tape library SONY LIB-162.

You should look into the systems log for SCSI-related messages. I 
guess you'll find some errors there. In some cases, replugging the 
SCSI connectors helps in these cases.

Arno

> Regards,
> Henry
> 
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-- 
Arno Lehmann
IT-Service Lehmann
www.its-lehmann.de

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