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SubjectRe: Kernel 2.6.17 and RAID5 Grow Problem (critical section backup)
Date
>>> Hm, what's superblock 0.91? It is not mentioned in mdadm.8.
>>>
>> Not sure, the block version perhaps?
>>
> Well yes of course, but what characteristics? The manual only lists
> 0, 0.90, default
> 1, 1.0, 1.1, 1.2
> No 0.91 :(


AFAICR superblock version gets raised by 0.01 for the duration of
reshape, so that non-reshape aware kernels do not try to assemble it
(and cause data corruption).

Petr

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