On Tue, 4 Apr 2000, Jay Soffian wrote:
So, RAID 0+1 = mirror -> stripe -> disk RAID 1+0 = stripe -> mirror -> disk
Yep, that's how I think of it.
The only advantage I know of using 0+1 is that it allows you to combine disks of different sizes into equal size stripe sets which can then be mirrored.
Ah, I never considered this scenario. You'd have to do some tricky command queue and rate throttling if your stripe sits on two drives of wildly differing performance characteristics!
EMC's RAID-S is a specialized RAID-5 implementation that offloads the XOR parity calculations to the drives (among other things, see: http://esdis-it.gsfc.nasa.gov/MSST/conf1996/C4_3Quinn.html).
Good link.
What does this have to do with Netapp? :)
Who cares? :)