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Old 01-18-2010, 10:08 PM
ABMX ABMX is offline
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==Using the existing example above==
That's where varying RAID controllers have different definitions regarding failures and the words they display related. From a raw point of view, independent of the RAID controller's chosen context, you'd be looking at something like this:

3 drive RAID5, offers 1 drive redundancy(All drives good means array OK!)
1 of 3 fail, no data loss should occur, no corruption should either(Array Degraded)
2 of 3 drives fail, technically the system shouldn't be bootable since RAID5 is built on a more complicated version of 3 + 1 = 4. You can determine the third number using any two knowns, be it half the data and a checksum/hash or both halfs of the data and not the checksum/hash. In this state data corruption should have already occurred. This could be identified several ways, Array Degraded, Array Failure, Array Dead, Array Missing.

What your more possibly looking at is partition corruption on top of a drive failure. Partition corruption can occur due to outside causes as well as just from a software point of view.
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Last edited by ABMX; 01-19-2010 at 08:55 PM.
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