[linux-lvm] filesystem corruption...

[Anders Widman]

>> On Wednesday, February 27, 2002 04:42:28 PM -0700 Andreas Dilger <adilger at clusterfs.com> wrote:

>>> On Feb 27, 2002  23:36 +0100, Anders Widman wrote:
>>>> Unfortunatley, something went seriously wrong. I can't mount the disk
>>>> any more, or use reiserfsck. They (mount/reiserfsck) say there isn't
>>>> a valid filesystem on the device. Vgscan does however find all devices
>>>> and can activate the volume group, but reiserfsck doesn't work.
>>>> 
>>>> What should I do to be able to save a s much data as possible?
>>> 
>>> dd if=/dev/vg/lv of=/new/disk conv=sync,noerror

>> Then we should be able to use debugreiserfs and reiserfsck to 
>> find a copy of the super in the log, or just recreate it.

>> -chris

> So. How much space would this require on the 'new' disk? The same
> amount as the entire LV? If that is, it would be impossible (for me,
> economically) to do this.

> The disk with bad blocks is 80GB, and I have a "spare" 80GB disk, but
> not more.

> //Anders

Oh, I forgot to ask how I can recover the filsystem
header/suprtblock.. What exactly is "dd if=/dev/vg/lv of=/new/disk
conv=sync,noerror" doing to the data, except copying it to the new
device?

//Anders