Wednesday, 20 July 2011

RAID 1E analysis delayed

If you want some unusual RAID layouts, call Promise. So far, Promise controller has the most bizzare RAID 6 variation we've seen, and also gave us a nasty surprise with RAID 1E.

Typically, RAID 1E would be laid out as follows

1 1 2
2 3 3
4 4 5
5 6 6

(the above is so-called NEAR layout)

or
1 2 3
4 5 6
7 8 9
3 1 2
6 4 5
9 7 8

(the above is FAR layout).

Now Promise combines the best of both worlds to produce a third variation (Promise 1E layout)

1 2 3
3 1 2
4 5 6
6 4 5

Looks promising, doesn't it?

So, the implementation of RAID 1E recovery capability in ReclaiMe Free RAID Recovery (www.FreeRaidRecovery.com) is delayed until we figure out how to handle this one.

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