Hello,
I'am in trouble running lvm (lvm-1.0.6 on a suse8.2 system with kernel 2.4.20)
on a raid md device which in turn is based on two md multiptah devices:
/dev/md20 (raid1)
/dev/md10 (mp) /dev/md13 (mp) mp=multipath
disk1 disk2
cat /proc/mdstat says this (just to make things clearer):
md20 : active raid1 md10[0] md13[1]
903371648 blocks [2/2] [UU]
md13 : active multipath sde2[0] sdh2[1]
903371712 blocks [2/2] [UU]
md10 : active multipath sdd1[0] sdg1[1]
903373696 blocks [2/2] [UU]
The basic setup worked just fine. I created one physikal volume on /dev/md20
(800GB) then one volumegroup "data" and then several logical volumes. So far
everything was fine. Then I deleted one logical volume and trouble started.
After the deletion I can no longer run vgscan. It keeps telling me (please
see attachment for vgscan -d output):
vgscan -- reading all physical volumes (this may take a while...)
vgscan -- found active volume group "data"
vgscan -- ERROR "pv_check_consistency_all_pv(): PE" volume group "data" is
inconsistent
vgscan -- ERROR: unable to do a backup of volume group "data"
vgscan -- ERROR "lvm_tab_vg_remove(): unlink" removing volume group "data"
from "/etc/lvmtab"
vgscan -- "/etc/lvmtab" and "/etc/lvmtab.d" successfully created
vgscan -- WARNING: This program does not do a VGDA backup of your volume group
I noticed that something must have gone wrong with the physical volume. It
seems to me that lvm did not only recognice the physical volume on /dev/md20
but somehow also on the underlying sub mirror devices /dev/md10 and
/dev/md13. Right after I created the logical volumes lvmdiskscan showed this:
...
lvmdiskscan -- /dev/md10 [ 861.52 GB] free meta device
lvmdiskscan -- /dev/md13 [ 861.52 GB] free meta device
lvmdiskscan -- /dev/md20 [ 861.52 GB] USED LVM meta device
...
Since the deletion of the logical volume it says:
...
lvmdiskscan -- /dev/md10 [ 861.52 GB] USED LVM meta device
lvmdiskscan -- /dev/md13 [ 861.52 GB] USED LVM meta device
lvmdiskscan -- /dev/md20 [ 861.52 GB] USED LVM meta device
...
Is there any known problem with lvm on raid1 on top of multipath devices?
Could it be that lvm wrote a pv-signature not only one the real physical
volume on /dev/md20 but also on /dev/md10 and /dev/md13 or is this a suse
bug?
I have to note that I did the changes to the PVs, VGs, LVs all with yast from
suse not with the pv* vg* lv* commandline tools. Is this a know source of
trouble?
Would be very greatful for any help since the system in question actually
should go into production very soon.....
Thanks Rainer
--
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Rainer Krienke, Universitaet Koblenz, Rechenzentrum
Universitaetsstrasse 1, 56070 Koblenz, Tel: +49 261287 -1312, Fax: -1001312
Mail: krienke@uni-koblenz.de, Web: http://www.uni-koblenz.de/~krienke
Get my public PGP key: http://www.uni-koblenz.de/~krienke/mypgp.html
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