Martin Drab wrote:
Speed is the issue here, I believe. By stripping two RAID-5 arrays you
ought to get the reliability of the RAID-5 but with considerably higher
speed. That's basically why RAID-50 exists, I think.
One big raid-5 would have higher speed because it would have one more
disk allocated to storing data rather than more parity. The raid 5+0
isn't really going to be any more reliable because it can withstand a
single failure in either half, but not two failures in one half, so in
the face of a double failure, you have a 50/50 chance of one being in
each half.
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