Analysis of disk file block with ZFS checksum error
Joe Peterson
joe at skyrush.com
Sat Feb 9 03:09:48 UTC 2008
Julian Elischer wrote:
> it could be an old file..
> what kind of disks?
It's a Seagate ST3500630A parallel ATA drive.
> I had a scenario where 3ware controllers were just failing to write to
> a drive in the array, so old data showed through.
I have an Intel ICH4 controller - nothing unusual.
> the filesystem and the partitions and the raids all were on different
> alignments so teh only part of the system that had a boundary that
> aligned with the bad data was the physical stripes laid down by the
> controller. It was 64k stripes and 64k data missing, exactly on
> stripe boundaries. Due to the fact that FreeBSD had partitioned the
> drive staring at 63 blocks in, nothing else aligned with the problem.
Hmm, well this is a straight-forward disk situation - never used RAID on
this drive. Give what is happening, I wonder the changes of it being
HW, OS, or a filesystem issue.
-Joe
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