topic Re: lvgremove in Operating System - HP-UX

lvgremove

subhashni — Sat, 12 Jan 2002 20:35:31 GMT

I wanted to remove a volume group named vg01.
In that i had 2 logical volumes(lvol1,lvol2).
I did lvremove for them.But after that i can see only one logical volume was removed.The other one is remaining.If i use lvremove on that "it is saying successfully removed:.But it remains there.If i do vgremove on vg01 it says you have logical volume in it.what should i do?I would like to remove the volume group.
suggesstions are appreciated.

Re: lvgremove

Helen French — Sat, 12 Jan 2002 20:52:30 GMT

Hi Subh,

This is the normal procedure :

1) Unmount the file systems (umount)
2) check through 'bdf' to confirm the umount.
3) remove LVs (lvremove lvname)
4) Confirm removal through 'lvdisplay' or 'vgdisplay -v'
5) remove vg (vgremove)

For an easy trial you can do this throgh SAM.
Remember to check up nobody is using the particular file systems.

HTH,
Shiju

Re: lvgremove

James R. Ferguson — Sat, 12 Jan 2002 20:52:47 GMT

Hi:

You say "I can see only one logical volume was removed.". How do you conclude this; the presence of device files (/dev/vg01/*) or doing 'lvdisplay /dev/vg01/lvolN'?

A simple way to eliminate almost all vestiges of a volume *group* (i.e. all of its logical volumes and device files) is to 'vgexport' the volume group. You will then only need to edit its logical volume mount points (if any) from /etc/fstab.

Regards!

...JRF...

Re: lvgremove

subhashni — Sat, 12 Jan 2002 21:15:24 GMT

After removing lvol1 and lvol2,i did vgremove.
It has given the error message as "can't remove the volume group ,there is existing logical volumes."

Re: lvgremove

Helen French — Sat, 12 Jan 2002 21:18:03 GMT

Hi,

Seems like it failed removing the LV. What will be the output of 'lvdisplay' and 'vgdisplay ? Does it show any LV information ? Did you try removing through SAM ?

Shiju

Re: lvgremove

Michael Tully — Sat, 12 Jan 2002 21:22:12 GMT

Hi,

In this situation it sounds like there
are still logical volumes in the group.
To check run the vgdisplay command
# vgdisplay -v /dev/vg01
It should return some information on
existing volumes. If so run the 'lvremove'
command.
# lvremove /dev/vg01/lvol?
Once all have been removed and any
other except the last physical
volumes by running
the 'vgreduce' command
# vgreduce /dev/vg01 /dev/dsk/cxtydz
only then can you run the 'vgremove'
command
# vgremove /dev/vg01

As suggested earlier by James, running
the 'vgexport' command will do the lot.

HTH
-Michael

Re: lvgremove

subhashni — Sat, 12 Jan 2002 21:33:04 GMT

the vgdisplay displays it contains one logical volume.

Re: lvgremove

James R. Ferguson — Sat, 12 Jan 2002 21:41:04 GMT

Hi (again):

So the 'vgdisplay' shows one logical volume. Is the logical volume one of those you 'lvreduce'd? Would you please re-do the 'vgdisplay' adding the verbose (-v) option. Also, do a verbose 'lvdisplay' on the remaining logical volume and post that.

Once again, if you have *nothing* on the volume group that you want, a 'vgexport' of the whole volume group should do a rapid cleanup.

# vgchange -a n /dev/vg01
# vgexport /dev/vg01

Regards!

...JRF...

Re: lvgremove

Sridhar Bhaskarla — Sun, 13 Jan 2002 04:46:14 GMT

If your idea is to remove the volume group, you can simply do a vgexport. You don't need to worry about the logical volumes in it.

#vgchange -a n vg01
#vgexport vg01

This will get you rid of vg01 from the system. You can do a pvcreate on the disks and start using them.

-Sri