Richard Elling - PAE wrote:
Non-recoverable reads may not represent permanent failures. In the case of a RAID array, the data should be reconstructed and a rewrite + verify attempted with the possibility of sparing the sector. ZFS can reconstruct the data and relocate the block.
True but if you're using a HW raid array or some sort of protection within a zpool then you're already protected to a large degree. I'm looking for the amount of cases where you get a permanent unrecoverable read error and yet can recover because you've got a ditto block someplace.
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