[linux-lvm] LVM recovery

[Melinda Taylor <melinda@phys.unsw.edu.au>]

Hi All,

I haven't yet recieved any advice on how to recover any of the data on
my remaining 2 of 4 disks but i think I know what to do.....think.....

I originally setup the system with the following steps:

- 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.

/dev/vg01/lv01
/dev/vg01/lv02
/dev/vg01/lv03
/dev/vg01/lv04

in my volume group.

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?

I have had a search and see something called importvg which I think may
be what I need.

Had anyone ever had any experience recovering a volume group with
missing disks?

I have backups of my lvm config but it seems like lvmtab etc are all
binary files, are they of any use to me?

Many Thanks,

melinda