Re: raid 5 mismatch_cnt errors

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Doug Ledford wrote:
On 05/20/2010 06:38 PM, Neil Brown wrote:
On Thu, 20 May 2010 17:29:37 -0500
Trey Scarborough <treys@xxxxxxxxxxxxxx> wrote:

Neil Brown wrote:
On Thu, 20 May 2010 12:02:23 -0500
Trey Scarborough <treys@xxxxxxxxxxxxxx> wrote:

I have a raid 5 array with 9 disks and I have a mismatch_cnt that keeps growing. This is causing file corruption on the underlaying file systems as well. I can copy a group of 100 100mb files and then do a md5sum on them and 1-3 will be corrupt. If this is a drive that is bad is there anyway to run a report on the count per drive that these mismatches occur. I have run smarttools test and do not see one drive that stands out to be causing errors. Could something else be causing these errors?

While a bad drive is certainly a possibility here, this is precisely the
type of failure scenario that would make me suspect bad RAM,
motherboard, or CPU.  So I wouldn't rule those out as possibilities either.

I have the same thought, I would remove half the RAM from the system and test again, then swap to the "other" half and repeat. Of course running memtest first is a good idea, but I have seen failures which only happen on disk access.

If the system is O/C obviously the first step is to cut the speed back...

--
Bill Davidsen <davidsen@xxxxxxx>
 "We can't solve today's problems by using the same thinking we
  used in creating them." - Einstein

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