RE: hot spare disk -- MIDRANGE-L

Subject: RE: hot spare disk
From: "Jones, John (US)" <John.Jones@xxxxxxxxxx>
Date: Tue, 29 Apr 2008 08:30:16 -0500
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If you're going to have the 'spare' drive spinning anyway and your
controller supports RAID6, go that route and gain that extra level of
protection.

After all, in RAID5 if you have a second drive fail between the time a
first drive fails & parity is rebuilt using the spare you crash. Under
RAID6 with two failures you drop to unprotected but stay up.

The only thing having a warm spare does for a RAID5 set is save you the
trip into the data center to plug the drive in. Well, it also wastes
electricity.

Follow-Ups:

RE: hot spare disk , Wilt, Charles

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