Re: RAID6 fails to assemble after unclean shutdown

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Brian Candler wrote:
On Wed, Apr 25, 2012 at 09:01:45PM +1000, NeilBrown wrote:
Presumably something when wrong during shutdown.  However without more
details (--examine) I cannot guess.

OK, thank you.

I've also found
https://raid.wiki.kernel.org/articles/r/a/i/RAID_Recovery_d376.html
which shows the --examine option too.

When building the array, would you suggest I also specify --bitmap=internal,
so that there is less data to resync after an error?

You are being very understated here ;-)
Without a bitmap you can spend days getting back up instead of minutes. Brian has the true truth here, unless there is a reason to avoid it, a bitmap is a ticket to a sane rebuild.

And if you have a big array, consider putting the bitmap on SSD, faster is better.


--
Bill Davidsen <davidsen@xxxxxxx>
  "We have more to fear from the bungling of the incompetent than from
the machinations of the wicked."  - from Slashdot
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