5.3. Splitting a Volume Group
5.3. Splitting a Volume Group In this example, an existing volume group consists of three physical volumes. If there is enough unused space on the physical volumes, a new volume group can be created without adding new disks. In the initial set up, the logical volume mylv is carved from the volume group myvol , which in turn consists of the three physical volumes, /dev/sda1 , /dev/sdb1 , and /dev/sdc1 . After completing this procedure, the volume group myvg will consist of /dev/sda1 and /dev/sdb1 . A second volume group, yourvg , will consist of /dev/sdc1 . 5.3.1. Determining Free Space You can use the pvscan command to determine how much free space is currently available in the volume group.
pvscan PV /dev/sda1 VG myvg lvm2 [17.15 GB / 0 free] PV /dev/sdb1 VG myvg lvm2 [17.15 GB / 12.15 GB free] PV /dev/sdc1 VG myvg lvm2 [17.15 GB / 15.80 GB free] Total: 3 [51.45 GB] / in use: 3 [51.45 GB] / in no VG: 0 [0 ]