Re: LVM array, one disk failed

[erik@debian.franken.de (Erik Tews)]

On Sat, Dec 28, 2002 at 05:07:31AM +0200, Tuomas Jormola wrote:
> Hello,
> 
> I'd be happy to use ReiserFS support services if they can help me here,
> but I'd like post this question to the mailing list before paying since
> PayPal doesn't support my bank so it's a bit troublesome to transfer the
> money forth and back in case there's nothing to do in this case...
> 
> I have a 110GiB LVM array constructed using EVMS. It consists of three
> IDE hard disks from which the last one died the other day. The
> filesystem is ReiserFS, of course. Array is a linear one and there was
> about 15GiB free space when disk died so I'm hoping there was a somewhat
> resonable way to recover the data on two disks that are full and in
> front of the array. The failed disk is totally dead, not just a couple
> of bad sectors. It spins but it's not detected on boot. When I try to
> mount the volume with only two disks connected, it get this:
> 
> sh-2029: reiserfs read_bitmaps: bitmap block (#19234816) reading failed
> reiserfs_read_super: unable to read bitmap
> 
> Someone already asked a question regarding this error:
> http://marc.theaimsgroup.com/?l=reiserfs&m=101232163203836&w=2
> and Andreas Dilger provided with a clear answer but in this case it
> probably doesn't work since so large part of the filesystem is missing.
> Is someone able to say for sure if there's a chance to recover parts of
> the filesystem or whether it can't be done?

Perhaps you should have a look at evms, it is able to eport a LV with
some missing disks. But of course every read to a sector on the missing
disk will result in an io-error.