5.3.3. Splitting the Volume Group

5.3.3. Splitting the Volume Group

To create the new volume group yourvg, use the vgsplit command to split the volume group myvg.

Before you can split the volume group, the logical volume must be inactive. If the file system is mounted, you must unmount the file system before deactivating the logical volume.

You can deactivate the logical volumes with the lvchange command or the vgchange command. The following command deactivates the logical volume mylv and then splits the volume group yourvg from the volume group myvg, moving the physical volume /dev/sdc1 into the new volume group yourvg. 

[root@tng3-1 ~]# lvchange -a n /dev/myvg/mylv
[root@tng3-1 ~]# vgsplit myvg yourvg /dev/sdc1
  Volume group "yourvg" successfully split from "myvg"

You can use the vgs command to see the attributes of the two volume groups. 

[root@tng3-1 ~]# vgs
  VG     #PV #LV #SN Attr   VSize  VFree
  myvg     2   1   0 wz--n- 34.30G 10.80G
  yourvg   1   0   0 wz--n- 17.15G 17.15G

Note: This documentation is provided {and copyrighted} by Red Hat®, Inc. and is released via the Open Publication License. The copyright holder has added the further requirement that Distribution of substantively modified versions of this document is prohibited without the explicit permission of the copyright holder. The CentOS project redistributes these original works (in their unmodified form) as a reference for CentOS-4 because CentOS-4 is built from publicly available, open source SRPMS. The documentation is unmodified to be compliant with upstream distribution policy. Neither CentOS-4 nor the CentOS Project are in any way affiliated with or sponsored by Red Hat®, Inc.