I just stumbled upon this whitepaper from EMC while doing some research for a possible case coming in. I think it's the best explanation I've ever seen of how RAID 6 actually calculates double parity and how it uses it to restore lost blocks in a two drive failure.
Anyone wanting to really understand the inner workings of RAID 6 EVENODD (not Reed Solomon) should read this. Wish I had it a few years ago when I was still struggling to really understand all the math.
http://www.emc.com/collateral/hardware/ ... raid-6.pdf
Anyone wanting to really understand the inner workings of RAID 6 EVENODD (not Reed Solomon) should read this. Wish I had it a few years ago when I was still struggling to really understand all the math.
http://www.emc.com/collateral/hardware/ ... raid-6.pdf