Re: [linux-lvm] LVM recovery

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

Oh ok stupid question 

vgchange -a y 

activates vg02 now back to vg01 the one that is missing 2 partitions, is
it impossible to create this vg01 without the other 2 partitions?

Thanks,

melinda


On Thu, 2003-07-17 at 14:20, Melinda Taylor wrote:
> 
> Ok I am now getting somewhere with this:
> 
> 
> I reinstalled LVM (but I am not sure what version I was running I think
> it was 1.0.5 - will this make a difference?)
> 
> "pvscan" told me remaining LV and the VG they belong to:
> 
> pvscan -- reading all physical volumes (this may take a while...)
> pvscan -- inactive PV "/dev/sdc1" of VG "vg02" [9.85 GB / 0 free]
> pvscan -- inactive PV "/dev/sdc2"  is associated to unknown VG "vg01"
> (run vgscan)
> pvscan -- inactive PV "/dev/sdd1" of VG "vg02" [19.54 GB / 0 free]
> pvscan -- inactive PV "/dev/sdd2"  is associated to unknown VG "vg01"
> (run vgscan)
> pvscan -- total: 4 [64.35 GB] / in use: 4 [64.35 GB] / in no VG: 0 [0]
> 
> vg02 was comprised of /dev/sdc1 and /dev/sdd1 which was /sw and /tmp so
> it can be rebuilt as sdc and sdd both still exist
> 
> I tried to rebuild it: vgimport vg02 /dev/sdc1 /dev/sdd1
> 
> and recieved the error:
> 
> vgimport -- error: physical volume "dev/sdc1" doesn't belong to exported
> volume group
> 
> So I tried: 
> 
> vgimport -f vg02 /dev/sdc1 /dev/sdd1
> vgimport -- physical volumes "/dev/sdd1" and "/dev/sdc1" are in
> different volume groups
> 
> Run vgscan:
> 
> [root@astro melinda]# /sbin/vgscan
> vgscan -- reading all physical volumes (this may take a while...)
> vgscan -- found inactive volume group "vg02"
> vgscan -- ERROR "vg_read_with_pv_and_lv(): current PV" can't get data of
> volume group "vg01" from physical volume(s)
> vgscan -- "/etc/lvmtab" and "/etc/lvmtab.d" successfully created
> vgscan -- WARNING: This program does not do a VGDA backup of your volume
> groups
> 
> Obviously vg01 is going to be the biggest problem but as both lv's from
> vg02 still exist - how do I make it active?
> 
> I then tried to mount it but it creates an error: /dev/vg02/lv02 is not
> a valid block device but it is there. So I am getting somewhere now at
> least but I presume I need to make everything active.
> 
> Thanks,
> 
> melinda
> 
> 
> 
> On Thu, 2003-07-17 at 10:35, Melinda Taylor wrote:
> > 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
> > 
> > 
> > 
> > 
> > _______________________________________________
> > linux-lvm mailing list
> > linux-lvm@sistina.com
> > http://lists.sistina.com/mailman/listinfo/linux-lvm
> > read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
> 
> 
> 
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