2009/8/4 mcclnx mcc <mcclnx@xxxxxxxxxxxx>:
>
> we have CENTOS 4.X on DELL server and one one of virtual disk include 4 disk configure as REID5 (one more disk for hot spare). I saw /var/log/messages file have:
>
> Aug 4 06:27:02 host1 Server Administrator: Storage Service EventID: 2094 Predictive Failure reported: Physical Disk 1:5 Controller 0, Connector 1
> Aug 4 06:27:02 host1 Server Administrator: Storage Service EventID: 2051 Physical disk degraded: Physical Disk 1:5 Controller 0, Connector 1
>
> I use DELL OPMN to check and found "disk 1:5" still "online", but "predicate failure".
>
> I also use DELL OPMN to check virtual disk and it show "online", not "degrade".
>
> my questions are:
>
> 1. is this disk really "degrade" or not?
>
> 2. how O.S. can predicate disk going to failure?
There are several possibilities, the most likely being that the
drive's predict-fail bit flipped, or the # of sectors available for
reallocation dropped below the manufacturer's recommended threshold.
The following links have additional information on drive failures, and
how to use SMART data to look at drive health:
http://www.usenix.org/events/fast07/tech/schroeder/schroeder_html/index.html
http://prefetch.net/articles/diskdrives.smart.html
Thanks,
- Ryan
--
http://prefetch.net
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