I'm sorry but I just can't comprehend from a theoretical point of view.
Why is it that running into a single URE, the raid controller decides everything else are ruined and just dies? Stupid. A 40 TB array is useless because 1mb is lost?
Rebuild the whole damn thing, then just do a checksum check on all the files if the filesystem supports it. Even if not, it's just a case of being prompted with "file corrupted" when trying to open those files.
This whole thing just screams stagnant hardware technology to me.
Edit- It seems people just jump straight on band wagon of "you shouldn't rely on RAID for backup". Well, I'm not interested in that. Yes RAID is for availability, not durability. The fact remains, you still can salvage ~99% of the RAID if the rebuild just skips over the URE.
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