Eyal Lebedinsky wrote:
Neil Brown wrote:
[trim Q re how resync fixes data]
For raid1 we 'fix' and inconsistency by arbitrarily choosing one copy
and writing it over all other copies.
For raid5 we assume the data is correct and update the parity.
Can raid6 identify the bad block (two parity blocks could allow this
if only one block has bad data in a stripe)? If so, does it?
This will surely mean more value for raid6 than just the two-disk-failure
protection.
No. It's not mathematically possible.
-hpa
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