Hi Maurice,
Do you mean a Serially-Attached SCSI aka SAS controller, I assume?
Is this a custom build machine or a vendor integrated one?
Regards,
Jeremy
Maurice Volaski wrote:
On Sep 17, 2007 13:31 -0400, Maurice Volaski wrote:
In using drbd 8.0.5 recently, I have come across at least two
instances where a bit on disk apparently flipped spontaneously in the
ext3 metadata on volumes running on top of drbd.
Also, I have been seeing regular corruption of a mysql database,
which runs on top of drbd, and when I reported this as a bug since I
also recently upgraded mysql versions, they question whether drbd
could be responsible!
Seems unlikely - more likely to be RAM or similar (would include cable
for PATA/SCSI but that is less likely an issue for SATA).
Shouldn't trip the ECC and produce machine check exceptions and ones
that were unrecoverable?
The disks are part of hardware RAID with a SATA II cableless
backplane and SATA-SCSI controller, so there is a SCSI cable and SCSI
HBA (LSI Logic).
--
high performance mysql consulting
www.provenscaling.com
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