Missing volume groups

[TMcB]

Hi folks

My server crashed and upon reboot it appears some of the volume groups are missing (spanning different disks).

I tried renaming lvmtab and running vgscan -v.
It listed the missing volume groups as "The volume group /dev/vgxx/group was not matched with any Physical Volumes."

Any help is greatly appreciated

[Rainer von Bongartz]

Terry,

seems to me your volume groups are not activated. You have to activate VG's at boot time in /etc/lvmrc.
Put your VG in there; reboot and you will see your missing groups.

to activate the VG not permanently at boot time issue the command
vgchange -a /dev/vgxx

Regards
Rainer

[TMcB]

Thanks for your help
I was able to get it sorted.

[Bill McNAMARA_1 · Accepted solution]

Move back your lvmtab to the original position or else the vgchange won't work.

vgchange -a y vgname

ll /etc/lvmconf/
and look for vgname.conf

vgcfgrestore -n /dev/vgname -l
to list what pvs are associated to the vgname and recorded in the /etc/lvmconf/vgname.conf

strings /etc/lvmtab to verify they are the same

From the device file for the vgname pv
issue and ioscan -fnkCdisk
and verify that the device for the PV is showing up as CLAIMED.
If it is not there, the hardware has probably failed and you should interrogate via ioscan -fnk exactly what has gone missing.
If it is claimed, the h/w has not failed and you probably have a vg not activating for some reason or other.. /etc/lvmrc customised activation is one reason.

vgchange -a y vgname
will manually activate.
Note any warnings.

Quorum errors mean that less than 51% of the disks are available in the vg, you can force activation to see what remains with
vgchange -a y -q n vgname
vgdisplay -v vgname

vgdisplay -v vgname will give you much information about the health of the vg, once it activates that is.

Have a look in your
/etc/shutdownlog
and
/var/adm/syslog/syslog.log
and OLDsyslog to see what happened prior to and after shutdown.

Later,
Bill