Re: [linux-lvm] Drive failure

["B. J. Zolp" <bjzolp@wisc.edu>]

On Thursday 15 May 2003 00:59, Herbert Poetzl wrote:
> On Wed, May 14, 2003 at 10:41:37AM -0500, B. J. Zolp wrote:
> > One of the drives in my volume group is developing bad sectors on it. 
> > When I mount the logical volume spanning that drive my entire machine
> > locks up. Should I be able to dd (without reading the bad sectors) the
> > failing drive (assuming it spins up and reads all the good sectors) to
> > the replacement drive, then run fsck on the unmounted volume and then
> > mount the volume with minimal data loss?
>
> I guess, this should work ... but make sure, that
> you do the copy operation on another system, otherwise
> the LVM stuff could/will be irritated by two diffent
> disks with the same signature (after copying over)
>

What if the LVM is down?  Then when the copy is complete I replace the bad 
drive with the replacement and bring the LVM back up.  That seems like it 
should work.

> > The other option I can think of is remove that drive from the volume and
> > then remount it, but that would mean a loss of everything that is one the
> > failing drive, plus I am not sure how reiserfs works with large chunks of
> > its file system removed like that.
>
> I wouldn't do that, neither with reiserfs nor with
> any other unix filesystem ... only as last escape
> if you disk is completely unreadable ...
>
> anyway, if possible make a copy of ALL disks involved
> before you do any fscking so you can go back and
> try any other approach ...
>
> best,
> Herbert
>
> > thanks
> >
> > bjz
> >
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>
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