Hi,
Kern Sibbald wrote:
>
> Two things:
>
> 1. Something seems wrong (possibly with your configuration). By default
> Bacula writes blocks of 64,512 bytes and not 65536 as indicated above on the
> error message. This makes me wonder. In any case, I don't recommend that
> you change the default -- especially when using disk storage without doing
> careful performance testing.
This came from tests with various blocksizes. It has been eliminated by now.
>
> 2. 99.9% of the time, if you are getting checksum errors on a disk, you have
> a
> bad disk, or in this case, possibly a bad disk driver (much less often, bad
> RAM).
>
> I recommend that you try doing a backup/restore of a small amount of data
> (e.g. 100MB) to a standard Debian fixed disk formatted with ext3. That will
> give you a good base of information. If you get the same errors, then it is
> most likely your conf file, and I would *definitely* like to see it.
> Otherwise you can duplicate the conf on the disk storage device and repeat
> the test using a small amount of data to start with.
>
I plugged a 250 Gig SATA drive into the standard onboard SATA
controller, formated it with ext3 and did some backup and restore
tests. It seems these worked. Tried restores up to 100 GB and all
worked well.
What this boils down to is that there seems to be a problem within the
3ware RAID Controller and/or its driver.
What is strange though is that the whole system runs of the same raid 5
array. And I have no problems with file corruption or anything else.
The second thing is that we had similar problems with other 3ware SATA
raid controllers using FreeBSD.
Is it possible that the error is triggered of by some special type
of file access that bacula uses or anything like that?
Next steps for me is to build the newest kernel (vanilla 2.6.20.3) and
update the controller firmware.
Do you have any hint what I can do to track down the caus of the
problem. Ah the Controller is a 3ware 9500S-12 .
Thank you very muche for your help.
Ekkehard
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