CentOS / RHEL : How to move a Volume Group from one system to another

To move a whole volume group from one system to another, the vgexport and vgimport commands can be used. Below example involves the steps to move a volume group named “data_vg” from one system to another. The logical volume from this volume group is initially mounted at /data01.

1. Un-mount the file system

If required switch to “rescue” mode. Make sure that no users are accessing files on the active volume.

# umount /data01

2. Mark the volume group inactive

Marking the volume group inactive removes it from the kernel and prevents any further activity on it.

# vgchange -an data_vg

vgchange -- volume group "data_vg" successfully deactivated

3. Export the volume group

This prevents it from being accessed on the “old” host system and prepares it to be removed.

# vgexport data_vg

vgexport -- volume group "data_vg" successfully exported

4. Un-present the Disk

Once the Disk has been unplugged from the server, it can be shutdown. The Disk can now be presented to the new Server on which VG data_vg has to be discovered.

5. Present the Disk to the new Server

When plugged into the new system it becomes /dev/sdb so an initial pvscan shows as below:

# pvscan 
pvscan -- reading all physical volumes (this may take a while...) 
pvscan -- inactive PV "/dev/sdb1" is in EXPORTED VG "data_vg" [996 MB / 996 MB free] 
pvscan -- inactive PV "/dev/sdb2" is in EXPORTED VG "data_vg" [996 MB / 244 MB free] 
pvscan -- total: 2 [1.95 GB] / in use: 2 [1.95 GB] / in no VG: 0 [0]

6. Import the Volume Group

If importing on an LVM 2 system, run below command:

# vgimport data_vg 

Volume group "data_vg" successfully imported

Else if importing on an LVM system, add the PVs that need to be imported:

# vgimport data_vg /dev/sdb1 /dev/sdb2

vgimport -- doing automatic backup of volume group "data_vg"

vgimport -- volume group "data_vg" successfully imported and activated

7. Activate the volume group

# vgchange -ay data_vg

8. Mount the file system

# mkdir -p /data01
# mount /dev/data_vg/lv_data01 /data01


ls /sys/class/scsi_device/ | while read scsidev ; do echo 1 > /sys/class/scsi_device/$scsidev/device/rescan ; done

echo "- - -" > /sys/class/scsi_host/host0/scan*

umount /filesystem

echo "offline" > /sys/block/OLD_DISK/device/state
echo "1" > /sys/block/OLD_DISK/device/delete

vgchange -an vg_group

vgexport vg_group
vgimport vg_group /dev/sde (next disk)

vgchange -ay vg_group

mount /dev/mapper/vg_group_lv /filesystem

cd /filesystem


0 (0)
Article Rating (No Votes)
Rate this article
There are no attachments for this article.
There are no comments for this article. Be the first to post a comment.
Full Name
Email Address
Security Code Security Code
Related Articles RSS Feed
RHEL: Create a local RPM repository
Viewed 8770 times since Sun, May 27, 2018
List usernames instead of uids with the ps command for long usernames
Viewed 984 times since Wed, Jul 25, 2018
debian Debian/Ubuntu Linux: Find If Installed APT Package Includes a Fix/Patch Via CVE Number
Viewed 7134 times since Sun, Sep 23, 2018
Linux Linux Network Statistics Tools / Commands
Viewed 7191 times since Mon, Sep 21, 2020
O’Reilly’s CD bookshelf
Viewed 7586 times since Wed, Jun 27, 2018
LVM: Remove a Filesystem / Logical Volume
Viewed 1246 times since Sat, Jun 2, 2018
How To Find Largest Top 10 Files and Directories On Linux / UNIX / BSD find
Viewed 1097 times since Mon, Oct 29, 2018
Secure NTP with NTS
Viewed 6823 times since Sun, Dec 6, 2020
LVM: Remove an existing Volume Group
Viewed 3787 times since Sat, Jun 2, 2018
How to Install and use Lsyncd on CentOS 7 / RHEL 7 rsync
Viewed 2328 times since Wed, Oct 31, 2018