• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar
  • Skip to footer navigation

The Geek Diary

  • OS
    • Linux
    • CentOS/RHEL
    • Solaris
    • Oracle Linux
    • VCS
  • Interview Questions
  • Database
    • oracle
    • oracle 12c
    • ASM
    • mysql
    • MariaDB
  • DevOps
    • Docker
    • Shell Scripting
  • Big Data
    • Hadoop
    • Cloudera
    • Hortonworks HDP

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

by admin

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
Note: To make the change persistent add an entry of the filesystem in /etc/fstab file.

Filed Under: Linux

Some more articles you might also be interested in …

  1. How to Configure Separate Port For SSH and SFTP On CentOS/RHEL
  2. lastb Command Examples in Linux
  3. tracepath: command not found
  4. Beginners Guide to “journalctl” – How To Use Journalctl to View and Manipulate Systemd Logs
  5. pw-cli Command Examples in Linux
  6. nft: command not found
  7. Configure Persistent NIC Names of Network Adaptors in CentOS/RHEL using udev Rules
  8. How to Migrate virtual machines from one host to another in the Red Hat Virtualization environment
  9. Basic Commands to Troubleshoot Performance Issues in Linux
  10. subscription-manager: command not found

You May Also Like

Primary Sidebar

Recent Posts

  • qm Command Examples in Linux
  • qm wait Command Examples in Linux
  • qm start Command Examples in Linux
  • qm snapshot Command Examples in Linux

© 2023 · The Geek Diary

  • Archives
  • Contact Us
  • Copyright