[linux-lvm] Help with restoring missing VG
B. J. Zolp
bjzolp at wisc.edu
Sat May 10 01:35:02 UTC 2003
Today my file server was acting up and I had to reboot it. Apon reboot the
system would lock up while mounting local file systems. I took the line that
mounted my logical volume out of fstab and the machine booted fine, but
manually mounting the volume also caused lockups.
I had a hunch that the most recent drive I added to the volume group was
dying, so I ran vgreduce vg0 /dev/hdf to remove that disk and hopeed to
still be able to access what was on the remainder of the volume. (I can live
with loosing what might be on the newer drive, but I absolutely need what is
on the other drives).
In any case the vgreduce command did not seem to be removing the pv, I cannot
remember the exact error however. I then ran a pvscan, which locked up, so I
rebooted again and now my vg0 volume group is not there. I can run pvscan
and get this:
pvscan -- reading all physical volumes (this may take a while...)
pvscan -- inactive PV "/dev/ide/host2/bus1/target0/lun0/disc" is associated
to an unknown VG (run vgscan)
pvscan -- inactive PV "/dev/ide/host2/bus0/target0/lun0/disc" is associated
to an unknown VG (run vgscan)
pvscan -- inactive PV "/dev/ide/host0/bus1/target0/lun0/part4" is associated
to an unknown VG (run vgscan)
pvscan -- inactive PV "/dev/ide/host0/bus1/target1/lun0/disc" is associated
to an unknown VG (run vgscan)
pvscan -- inactive PV "/dev/ide/host0/bus0/target0/lun0/part7" is associated
to an unknown VG (run vgscan)
pvscan -- inactive PV "/dev/ide/host0/bus0/target1/lun0/disc" is associated
to an unknown VG (run vgscan)
pvscan -- total: 6 [565.71 GB] / in use: 6 [565.71 GB] / in no VG: 0 [0]
***^^^^ NOTE: the failing drive is no longer listed as a pv, so apparently
that drive has atleast been removed
but vgscan gives me:
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
I was going to try to recreate the VG, but wanted to do somemore research and
check this list before doing so, I do not want to loose any data.
My layout is pretty simple one logical volume using 100% of the volume group
spanned over 6-7 drives.
So basically I would atleast like to get the drives listed in pvscan above
added back to a VG that I can mount and access the data from.
thanks for any help you can spare,
bjz
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