Lots of bad disks with PE1955's running RHEL4?

[Nathan Hruby]

Howdy,

Over the past few weeks we've had an alarming number of disks kicked
out of the SAS RAID controllers on our PE1955's running RHEL4-u4 (I
think a dozen replacements in the past 6 weeks, and this morning 7
machines are seemingly unhappy).  Sadly, the Win2k03 and VMware 1955's
(and everything else) are very happy though so I don't think it's an
environmental problem with our datacenter but clearly something with
our deployment, workload, hardware, or some entertaining combination
of the 3.

Has anyone else seen these kinds of issues with their 1955's?

Also, when I arrived here I was surprised to find that all of these
systems were using the mpt drivers (including mptsas) instead of the
megaraid_sas driver.  That sounds like an immediate red flag to me,
but it's been a long while since I used Dell hardware, so what do I
know?  That might be right considering lspci doesn't see anything
PERCish.

Thanks for any insight one might have to give :)

-n
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nathan hruby <nhruby at gmail.com>
metaphysically wrinkle-free
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