Re: Peculier raidframe problems

[Dave Tyson <dtyson%anduin.org.uk@localhost>]

On 12/19/14 15:10, Greg Oster wrote:
> On Fri, 19 Dec 2014 15:03:48 +0000
> Dave Tyson <dtyson%anduin.org.uk@localhost> wrote:
>
> > On 12/19/14 00:49, Greg Troxel wrote:
> >   > Does dmesg show any disk errors?  Can you dd from the disk
> >   > to /dev/null without errors?
> >   >
> >
> > No disk errors reported. I started a dd of /dev/rwd1d to /dev/nulland
> > this was over halfway through when the UPS threw a wobbler and caused
> > a reboot. When the system came back raid0 showed both disks optimal.
> >
> > No idea why the problem arose or how it fixed itself - but I'll take
> > fs dump to tape which should flush out any problems...
> >
> > Sorry for the noise!
> Hmmmmm.... it shouldn't just 'fix' itself like that..... I'd do a
> 'rebuild-in-place' ('raidctl -R')  on whatever component was last to
> join... otherwise you run the risk of at some point reading in corrupt
> data...
>
> Later...
>
> Greg Oster

Hmm. I did a rebuild in place for /dev/wd1a which was OK, but after a 
shutdown and reboot its marked as failed again :-( A full dump of the 
filesystems on raid0 was fine and the block counts are about what is 
expected.

I think it might be easier to restore the dump to a spare disk, boot off 
that having marked raid0 as non-autoroot and destroy/recreate it and 
then restore the fiesystems. Unless there is anything else worth trying...

Cheers,
Dave

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