Missing LVM disks, kind of

[Mitchell Johnston]

I am having a problem with LVM when trying to add logical volume. I thought it was an issue with /etc/lvmtab. I tried to recreate it, but it did not work. Any help?

See the attached document for deatils.

[Pedro Cirne]

Hi,

What LVM errors are you having? Would you post the errors?

Pedro

[melvyn burnard]

what errors or messages did you get when issung the lvcreate command?

[S.Arunkumar]

Hi Mitchell
It seems no problem with the lvmtab file.Can u post the error message what you get during the lvcreate and in which VG

Regards
S.Arunkumar

[Kent Ostby]

Mitchell --

It looks like there is a descrepency on the second vg since it shows 4 Current and 3 Active PVs.

I know you have six physical devices in lvmtab for it. I think these are two links of three devices each. Did you have a fourth drive or initially do an add of a device before it was a link ?

[Mitchell Johnston]

The error I get when adding a volume:

The command used to create logical volumes, /sbin/lvcreate, has
failed. The stderr output from the command is shown below. The
logical volume has not been created.

vgcfgbackup: /etc/lvmtab is out of date with the running
kernel:Kernel indicates 7 disks for "/dev/lawvg1"; /etc/lvmtab has 6
disks.
Cannot proceed with backup.

Help

[Pedro Cirne]

Hi,

The vg display shows that current PV=4 and active PV=3.

Check with ioscan -fnCdisk if "/dev/dsk/c0t6d0" is CLAIMED.

Did you add/remove disk from this server? Are those this on a SAN?

Pedro

[S.Arunkumar · Accepted solution]

Hey

Can u activate the Vg in low quorum mode.

#vgchange -a y -q n /dev/vglaw1


Regards
S.Arunkumar

[Mitchell Johnston]

No disk changes have been made. It is using an EMC and that is not showing any errors. Nor have any changes been made.

[Mitchell Johnston]

This worked:

ustpdev4[/]#vgchange -a y -q n /dev/lawvg1
Volume group "/dev/lawvg1" has been successfully changed.