Could drbd randomly flip bits? Was: Database page corruption on disk occurring during mysqldump on a fresh database and Was: Spontaneous development of supremely large files on different ext3 filesystems
Maurice Volaski
mvolaski at aecom.yu.edu
Mon Sep 17 18:37:06 UTC 2007
>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).
--
Maurice Volaski, mvolaski at aecom.yu.edu
Computing Support, Rose F. Kennedy Center
Albert Einstein College of Medicine of Yeshiva University
More information about the Ext3-users
mailing list