Messages in this thread | | | Date | Wed, 26 Aug 2009 23:29:56 -0400 | From | Rik van Riel <> | Subject | Re: [patch] ext2/3: document conditions when reliable operation is possible |
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Pavel Machek wrote: > Hi! > >>> Ok, can you help? Having a piece of MD documentation explaining the >>> "powerfail nukes entire stripe" and how current filesystems do not >>> deal with that would be nice, along with description when exactly that >>> happens. >> Except of course for the inconvenient detail that a power >> failure on a degraded RAID 5 array does *NOT* nuke the >> entire stripe. > > Ok, you are right. It will nuke unrelated sector somewhere on the > stripe (one that is "old" and was not recently written) -- which is > still something ext3 can not reliably handle.
Not quite unrelated. The "nuked" sector will be the one that used to live on the disk that is broken and no longer a part of the RAID 5 array.
I wouldn't qualify a missing hard disk as a software issue...
-- All rights reversed.
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