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The part that makes me recoil in horror is the potential damage wrought by one failure - at what point does the rebuild time for your RAID Array start to collid
by Aloha 8y ago
The part that makes me recoil in horror is the potential damage wrought by one failure - at what point does the rebuild time for your RAID Array start to collide with the MTBF for the drives? ;-)
- calcifer 8y agoWe are getting there, this already happens with unrecoverable read errors (URE). With RAID5 for example, rebuilding a 4TiB array is expected (i.e. >50% chance) to have at least one URE.
- notacoward 8y agoThis is why the really big storage systems use erasure coding. At scale, RAID-5 and even RAID-6 are vulnerable to these kinds of overlapping failures. Not theory; seen it happen.