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Forum Discussion
Xraid 5 Parity and Stripping how much capacity?
I've been trying to get my head round this one. Take a 4 drive nas for instance with four 500gb drives. With xraid5 the volume availanle is 1500gb. That's where I'm stumped and I know it's because of ...
Thanks all for your input. I originally thought the parity block was a copy of the other blocks in the strip. This is still a mystery to me. 75% is for data, if I used that up the 25% would have a one-in-four chance of knowing which drive is going to fail. I know that's not true and I guess xor has something to do with this.
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