On 12/29/2009 09:27 AM, Michael Cronenworth wrote:
Rick Wagner on 12/28/2009 09:41 PM wrote:
1) Where can the errors be coming from? I would understand if a
drive were reporting errors. Could it be during boot, one of the
R-1 members is being written too before MD is started?
If you have X running, you can start palimpset and view SMART data. If
you don't have X running, you can run "devkit-disks --dump" to view
SMART data. Look for "reallocated sectors", "uncorrectable sectors", or
"pending sectors", and if they are not showing 0 for current value, then
you have bad sectors forming.
The OP already said he didn't have any drive errors...
I also have the same problem -- my RAID-1 array regularly has a
non-zero mismatch_cnt. For a RAID-1 array, this isn't *necessarily* a
problem, especially with swap or mmap'ed files on the array. See this
post on the CentOS mailing list for more info:
http://lists.centos.org/pipermail/centos/2009-December/086667.html
Cheers,
Raman
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