Re: [OT?] LVM questions - I have seriously screwed my system
On 10/20/05, Goswin von Brederlow <brederlo@informatik.uni-tuebingen.de> wrote:
> Mounting totaly ignores the partition type anyway. So that did
> nothing. But running pvcreate will have overwritten some data.
>
> Try mounting with an alternate superblock and mount read-only and save
> whatever you can.
>
What does it mean to "mount with an alternate superblock". I don't get
this. Can you give me an example?
On 10/20/05, Lennart Sorensen <lsorense@csclub.uwaterloo.ca> wrote:
> Well if pvcreate was run, and that is all, perhaps looking at the lvm
> backup data in /etc can tell what the UUID used to be and pvcreate might
> allow you to tell it what uuid you want used on that device. Then lvm
> should recognize it again. pvcreate doesn't overwrite the data area of
> a pv, just the block containing the size and uuid and such (and the size
> shouldn't have changed). Unless I am missing something in my
> understanding of LVM that is. If it was not previously an lvm device,
> then year whatever was there is not hurt badly.
Yes, I can open the file /etc/lvm/backup/media_vg. The IDs of the
physical volumes look OK. The PV UUID of each disc matches what is in
that file.
Craig
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