On 04/28/2009 11:52 PM, f-lvm media mit edu wrote:
Btw, one way to proceed on the test-your-hardware angle without
yanking disks (or even opening the case) and possibly turning this
into a heisenbug if it really -is- something like cabling would be
to do something like this:
dd if=/dev/hda bs=1M count=1000 | md5sum
<snip>
And report back; it'd be good to close the loop on this if it's proven
-not- to be an LVM issue.
Frequent mismatched sha1sums on /dev/sdf which has the PV for the problem LV. All other /dev/sd* ran clean.
Thanks for the valuable debugging method. Looks like a SIL 680 card, or cable, or Seagate drive problem, but will be easy to isolate.