[linux-lvm] LVM recovery

[Emmanuel Varagnat]

Melinda Taylor wrote:

> - vgscan
> vgscan -- reading all physical volumes (this may take a while...)
> vgscan -- "/etc/lvmtab" and "/etc/lvmtab.d" successfully created
> vgscan -- WARNING: This program does not do a VGDA backup of your volume
> group
> - pvcreate /dev/sda2 ; pvcreate /dev/sdb1; pvcreate /dev/sdc2; pvcreate
> /dev/sdd2
> - vgcreate vg01 /dev/sda2 /dev/sdb1 /dev/sdc2 /dev/sdd2
> - check no of LE pvdata -E /dev/sdc2 (5710 LE)
>  lvcreate -l 5711 -n lv03 vg01 /dev/sdc2
> - Make ext3 fs on each LV
>  mkfs.ext3 /dev/vg01/lv01
> 
> /dev/sda2 and /dev/sdb1 are kaput (both drives died within days of
> eachother).
> 
> I believe I had 4 logical volumes.

I would say that it can depend on what is the block allocation policy of 
the LVM system...

> So I presume this means each LV resided on a separate drive and probably
> lv01 and lv02 were the 2 on the 2 dead disk drives.
> 
>     * PVs on four SCSI devices
>     * A VG called "vg01" comprised of said PVs
> 
> If I reinstall lvm on my newly installed system can I recover lv03 and
> lv04?

You should try LVM2 that can deal with partial/truncated volumes.

-=( manu )=-