Date: Wed, 26 Apr 2006 20:17:31 -0500 From: Jonathan Horne <jhorne@dfwlp.com> To: freebsd-questions@freebsd.org Subject: OT - drives in a RAID5 configuration Message-ID: <200604262017.31810.jhorne@dfwlp.com>
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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? thanks all, jonathan
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