Removing a drive from root volume group

[Ed Hon]

I have a test system in which the root volume group consists of two mirrored drives. I want to reclaim one of the drives, letting the root drive run unmirrored. I've already lvreduced the logical volumes off the other drive. How do I remove it from the root volume group itself?

[George A Bodnar]

vgreduce vg00 /dev/dsk/cX

[A. Clay Stephenson]

After you have run the lvreduce command on each LVOL, you then run the vgreduce command and specify the desired drive. Man vgreduce for details.

[Sanjay_6]

Hi Ed,

Use vgreduce to reduce the disk from the vg. Do "man vgreduce" for more help with the command.

Hope this helps.

Regds

[Martin Johnson]

vgreduce pv_path

See man vgreduce. You may want to do a vgdisplay -v first to insure the drive is not still in use (this is especially important if you are going to use the "-f" option of vgreduce).

HTH
Marty

[S.K. Chan · Accepted solution]

After you have "lvreduce -m 0" pn all the LVs, run ..
# lvlnboot -v
to make sure the boot LVs are no longer mirrored. Then you would just run ..
# vgreduce vg00 /dev/dsk/cXtYdZ

[Wayne Yu_1]

If you have already remove the drive by vgreduce and the drive is still in the lvmtab, you could
mv /etc/lvmtab /etc/lvmtab.old
vgscan

that will generate a new /etc/lvmtab that has no information about the other drive. Please make sure the drive you removed is not the first boot drive, If you removed the first boot drive, you will need to modify the
/stand/bootconf to have the new primary boot drive path. Otehrwise it will have problem bulding kernel. In addition, check boot path by
setboot
command. if you want to change any of the boot path, you could do
setboot -p x.x/x.x
or setboot -a x.x/x.x

where x.x/x.x is the hardware path you find from ioscan.