Re: mdadm create corrupted md data?

[Marc MERLIN <marc@xxxxxxxxxxx>]

On Wed, May 07, 2008 at 10:29:36AM +0100, David Greaves wrote:
> Marc MERLIN wrote:
> > After that, I get my pv back, and my VG.
> > 
> > I did try an e2fsck -f -n -C 0 /dev/dshelf2/space when in the configuration
> > with sdd1 (i.e. the drive I first tried to rebuild parity on, until I found
> > out it was sde1 that had bad sectors), and it is showing some pretty scary
> > errors that probably show that my fs is mostly toast if I elect to use sdd1
> > instead of sde1.
> > Considering that sde1 is the soon to be dead drive, I guess backups is where
> > I go next.
> 
> I would obtain a replacement drive for sde and use gnu ddrescue (dd with error
> retries) to create an image on a reliable drive. Then re-create the array using
> the replaced sde instead of sdd. You should have more luck that way.
 
True, I could do that too.
 
> If you still have fsck issues then I'd suggest that the futzing around may have
> caused corruption.

No, that should work fine. The array works fine with sde, I'm just surprised
that it is now half corrupted if I use sdd instead. I'm not sure I
understand why, but I guess that drives the point that I should be even
more careful about which drive I select after a double failure.

Anyway, thanks for the suggestions.

Marc
-- 
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
Microsoft is to operating systems & security ....
                                      .... what McDonalds is to gourmet cooking
Home page: http://marc.merlins.org/  
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