OT - drives in a RAID5 configuration
jhorne at dfwlp.com
Thu Apr 27 01:17:34 UTC 2006
i would like to ask my freebsd peers a hardware question:
my FreeBSD 6.0 server has a 3ware 6800 8 channel IDE raid controller.
configuration is 6 disks, 4 120GB disks (/opt) in RAID5, and 2 76GB disks in
RAID1 (everything else). one of the 76GB drives has failed. i have a few
options that i could persue, but one option i need some advice on.
i have another 120GB disk here at my apt, but its not the same model as the
other 4 120s that are currently in the server. they are otherwise identical,
but the 4 have 8mb cache, and the one here has 2mb cache. if i eliminate the
76GB RAID1, and (break/rebuild) the RAID5 with the additional 2mb chace 120GB
drive, what kind, if any, performance degrdation would i expect? in a
hardware RAID5 configuration, does the cache on the drive play a major role?
on a related note, is anyone using any 3ware controllers in FreeBSD, and is
there a way to monitor status (healthly, failed) from within the OS?
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