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From: Arno Wagner on 20 Dec 2007 01:35
Previously markm75 <markm75c(a)msn.com> wrote:
> With a 4 drive raid10.. i'm a little unclear on how many can fail here
> and still work..

A raid 10 uses RAID1 components as basis to build a RAID 0 on
top. If in any of the RAID1 subcomponents two drives fail, the
whole array fails.

For 4 drives that would be two RAID1 pairs. If 1 drive fails,
the array works. If 2 drives fail, it may or may not work.
3 drives kill oit reliably.


> Same with 8 drive?

That would be 4 RAID1 pairs.

1 drive failure will not kill it. 2-4 drive failures may or may
not kill it, depending on whcih drives fail. 5 drives reliably
kill the array.

Arno
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