Thanks for continuing to mull this one :-) On 04/11/17 13:46, Wols Lists wrote: >> >> I am pretty sure that is trashed, but I like to try and understand these >> things ! >> > More for Neil, this, but I've had a nasty thought. Did you reboot at all > (as in clean shutdown, not crash and restart) at any point during this? > I get the impression you might not have. > That I cannot remember to be honest. As I previously mentioned I *think* it may have fallen over or crashed during the first rebuild but my memory of exact events back then is hazy. I can try and fire it up and check the logs - maybe they will have some history. > Because that *could* explain the missing superblocks! I think raid > updates the superblock every time it moves the rebuild window, so it > should get rewritten to disk regularly. BUT. Is it possible that it was > sitting in the disk cache when the system crashed? > > I find it hard to believe that's the case, but it could explain at least > some of it (doesn't explain why those drives had mbr's, though). > I'm pretty sure the cards in use are that old they have precious little cache in them. However that might not be the case. I'll go check if I can see anything in any of the logs. B. Rgds John -- PS - I seem to remember I should do reply to all on this list but can't see where I might have read that ! Please let me know if that is wrong
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