Manage Volume Groups
2016/09/12 |
This is the basic operation of managing Volume Groups.
It needs to create Phisical Volume first. |
|
[1] | Create Volume Group. |
root@dlp:~#
vgcreate vg_dlp /dev/sdb1 Volume group "vg_dlp" successfully created # specify like follows if you'd like to use multiple devices root@dlp:~# vgcreate vg_dlp /dev/sdb1 /dev/sdd1 Volume group "vg_dlp" successfully created |
[2] | Display Volume Groups. |
root@dlp:~# vgdisplay vg_dlp --- Volume group --- VG Name vg_dlp System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 1 VG Access read/write VG Status resizable MAX LV 0 Cur LV 0 Open LV 0 Max PV 0 Cur PV 1 Act PV 1 VG Size 80.00 GiB PE Size 4.00 MiB Total PE 20479 Alloc PE / Size 0 / 0 Free PE / Size 20479 / 80.00 GiB VG UUID Q3c0yC-ZgGf-E0aX-tZsv-wLe8-DETH-XDqPER |
[3] | Change Volume Group's name. |
root@dlp:~# vgrename vg_dlp vg_data Volume group "vg_dlp" successfully renamed to "vg_data" root@dlp:~# vgdisplay vg_data --- Volume group --- VG Name vg_data System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 2 VG Access read/write VG Status resizable MAX LV 0 Cur LV 0 Open LV 0 Max PV 0 Cur PV 1 Act PV 1 VG Size 80.00 GiB PE Size 4.00 MiB Total PE 20479 Alloc PE / Size 0 / 0 Free PE / Size 20479 / 80.00 GiB VG UUID Q3c0yC-ZgGf-E0aX-tZsv-wLe8-DETH-XDqPER |
[4] | Display reports of Volume Groups. |
root@dlp:~# vgs VG #PV #LV #SN Attr VSize VFree centos 1 2 0 wz--n- 49.51g 0 vg_data 1 0 0 wz--n- 80.00g 80.00g |
[5] | Scan Volume Groups. |
root@dlp:~# vgscan Reading all physical volumes. This may take a while... Found volume group "centos" using metadata type lvm2 Found volume group "vg_data" using metadata type lvm2 |
[6] | Extend Volume Group. |
# add sdc1 to vg_data root@dlp:~# vgextend vg_data /dev/sdc1 Volume group "vg_data" successfully extended root@dlp:~# vgdisplay vg_data --- Volume group --- VG Name vg_data System ID Format lvm2 Metadata Areas 2 Metadata Sequence No 4 VG Access read/write VG Status resizable MAX LV 0 Cur LV 0 Open LV 0 Max PV 0 Cur PV 2 Act PV 2 VG Size 160.00 GiB PE Size 4.00 MiB Total PE 20479 Alloc PE / Size 0 / 0 Free PE / Size 20479 / 160.00 GiB VG UUID Q3c0yC-ZgGf-E0aX-tZsv-wLe8-DETH-XDqPER |
[7] | Reduce Volume Group. |
# remove sdc1 from vg_data root@dlp:~# vgreduce vg_data /dev/sdc1 Removed "/dev/sdd1" from volume group "vg_data" root@dlp:~# vgdisplay vg_data --- Volume group --- VG Name vg_data System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 2 VG Access read/write VG Status resizable MAX LV 0 Cur LV 0 Open LV 0 Max PV 0 Cur PV 1 Act PV 1 VG Size 80.00 GiB PE Size 4.00 MiB Total PE 20479 Alloc PE / Size 0 / 0 Free PE / Size 20479 / 80.00 GiB VG UUID Q3c0yC-ZgGf-E0aX-tZsv-wLe8-DETH-XDqPER |
[8] | Delete Volume Group. |
# disable target volume group first and delete it root@dlp:~# vgchange -a n vg_data 0 logical volume(s) in volume group "vg_data" now active root@dlp:~# vgremove vg_data Volume group "vg_data" successfully removed |