Hello,
On 6/14/2006 2:42 PM, Nikolai Brieger wrote:
> **********bug report************
> ********************************
>
> problem - cannot read/write on tape with Bacula
> tar and cpio are working but Bacula don't want to read and write on the tape.
> Due to some strange reasons the volume is not detected and cannot be mounted.
> There are a lot of Input/Output Errors. Please have a look at the following
> outputs. Maybe it is also a problem with the SCSI card? I mean, it has shown
> me a lot of these errors ("parity error detected in Data-in phase") until I
> disabled the parity check in the boot settings. I also checked already the
> cable and the terminations. But I don't know what to do as I'm just a trainee
> trying to get Bacula working for a company system.
> I would be pleased to recieve some help
> Thanks
Looks like a hardware problem to me. The usual suggestion in such a case
is not to check the cabling but to replace it :-)
Works wonders, just some weeks ago I change an internal scsi cable here
and voilà, I save some MB of log output per day :-)
To verify if this is a hardware problem, I'd recommend to turn on parity
checking again, and then use dd to send lots of prepared test data to
the tape drive. Still, more sophisticated SCSI-hardware related problems
usually don't show up until you really put some stress on the system.
For example, the case I mentioned above, only produced errors when I had
more than one backup job running (the cable in question connected the
SCSI HBA with a spool disk) and simultaneously despooled data to tape.
For testing, I ran multiple instances of badblocks on that disk and no
errors occured.
Summary: The only relevant test is running in production.
Arno
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