Removing unused VG

[Madhu_17]

Hi Friends,

I would like to remove the unused VG. this VG is having one lv defined. Can anybody give me step by step commands to remove this Lv, VG and PV.

Thanks,
Madhu

[Ravi_8 · Accepted solution]

Hi,

#vgdisplay -v
will display lvol's existing in it, check the existing lvol's and take a backup of data if needed.

#lvremove /dev/vgxx/rlvolxx
#vgremove /dev/vgxx < to remove vg>
#vgscan -v

once you remove the vg, Physical disk (PV) is free ( check using vgdisplay -v )
which you can unplug

[Madhu_17]

Hi,

I am able to remove LV and VG. I am able to add that disk to other VG also.

But only thing is that in /etc/lvmconf, still i'm able to see the configuration details of that old VG. even in /dev also, those old VG details are visible. how to remove all those entries. so that i can use the same VG number and minor numbers in the future.

i tried vgscna -v without any success.


Thanks,
Madhu

[Bharat Katkar]

Madhu,

# vgexport

Be very sure of the VGname before executing the command.


Regards,

[Ravi_8]

Hi

#mv /etc/lvmconf /etc/lvmconf.old
#vgscan -v

what's the content of /etc/lvmconf?

[Madhu_17]

Ravi,

/etc/lvmconf is a directory.Do you want me to move the whole directory?

vgxx.conf file in /etc/lvmconf is showing the disk device file.

when i ran vgscan -v it's giving the warning message "The Volume Group /dev/vgxx/group was not matched with any Physical Volumes.
Scan of Physical Volumes Complete."

I think problem is with /dev/vgxx/group file. Can i remove this file directly?


Thanks,
Madhu

[Ravi_8]

Hi Madhu

/etc/lvmconf is a directory.
when you run vgscan, corresponding vgxx under /etc/lvmconf files will be updated,

The vgremove will remove the specified vg's minor number (0x010000 etc.

check whether the disk is claimed or not (ioscan -fnC disk)

[Nguyen Anh Tien]

Only take
#vgexport vgname
is enought.

[Madhu_17]

Ravi,

disk is claimed only. I added this disk to other VG also.

i ran vgremove while removing the Vg. but the /dev/vgxx directory is still exists.

how can i remove this?

[Ravi_8]

Hi Madhu

vgremove should be remove the entire instances (including directory) of the volume group. If still exist use rm -rf /dev/vgxx to remove it.

make sure you are removing the dir of that VG (vgxx) only, removing VG00 leads to system crash

[Madhu_17]

found the solution