Two RAID6 questions

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(Before I start, thanks to everybody who replied to my previous
questions.)

First, can raidreconf grow a RAID6 device? The man page doesn't seem to
mention RAID6 at all.

Second, with RAID5 or RAID6 my biggest fear is a system crash whilst the
RAID is writing resulting in dirty blocks. Does RAID6 give some sort of
ECC capability when reconstructing? I'm imagining checking the parity of
a RAID block and if it's wrong assuming each block in turn is dirty,
recalculating it from the first parity and then checking the result
against the second parity.

Thanks

John




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