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(linux_command_line)-> (Parent)->Why use raid 6 ?? submited by Russell Thu 17 Feb 05
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Well I can't claim to be an expert on it, but it seems to work for me. Raid 6 is raid 5 with Extra parity. I have built a minimal drive with 4 160 mb hard drives and 100 percent redundancy.

[Data 1][Data 2][Parity 1][Parity 2]

with this configuration I get the safety of being able to endure failure of ANY TWO drives. If I was using Mirroring:

[Data 1][Data 2][Mirror 1][Mirror 2]

I would not be able to endure a failure of (data 1 AND Mirror 1) OR (Data 2 AND Mirror 2).

With Raid 6 if a single drive is lost it behaves as a Raid 5.

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