Re: Unmountable Array After Drive Failure During Device Deletion

[Duncan <1i5t5.duncan@cox.net>]

Chris Kastorff posted on Thu, 19 Dec 2013 01:26:57 -0800 as excerpted:

> I'm using btrfs in data and metadata RAID10 on drives (not on md or any
> other fanciness.)
> 
> I was removing a drive (btrfs dev del) and during that operation, a
> different drive in the array failed. Having not had this happen before,
> I shut down the machine immediately due to the extremely loud piezo
> buzzer on the drive controller card. I attempted to do so cleanly, but
> the buzzer cut through my patience and after 4 minutes I cut the power.
> 
> Afterwards, I located and removed the failed drive from the system, and
> then got back to linux. The array no longer mounts ("failed to read the
> system array on sdc"), with nearly identical messages when attempted
> with -o recovery and -o recovery,ro.

This may be a stupid question, but you're missing a drive so the 
filesystem will be degraded, but you didn't mention that in your mount 
options, so...

Did you try mounting with -o degraded (possibly with recovery, etc, also, 
but just try -o degraded plus any normal options first)?

-- 
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"Every nonfree program has a lord, a master --
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