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Volume Group
2011/05/09 |
| [1] | Create a Volume Group |
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[root@dlp ~]# vgcreate vg_dlp /dev/sdb1 # create a Volume group 'vg_dlp' Volume group "vg_dlp" successfully created # insert a space like follows if you specify some devices [root@dlp ~]# vgcreate vg_dlp /dev/sdb1 /dev/sdd1 Volume group "vg_dlp" successfully created |
| [2] | Display Volume Groups |
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[root@dlp ~]# vgdisplay --- 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 100.00 GiB PE Size 4.00 MB Total PE 25599 Alloc PE / Size 0 / 0 Free PE / Size 25599 / 100.00 GiB VG UUID eoFugC-cEfQ-0qeq-xMuu-yynx-wZA0-qTMt3x
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| [3] | Rename a Volume Group |
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[root@dlp ~]# vgrename vg_dlp vg_data # change name from 'vg_dlp' to new name 'vg_data-7' Volume group "vg_dlp" successfully renamed to "vg_data" [root@dlp ~]# vgdisplay --- Volume group --- VG Name vg_data 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 100.00 GiB PE Size 4.00 MB Total PE 25599 Alloc PE / Size 0 / 0 Free PE / Size 25599 / 100.00 GiB VG UUID eoFugC-cEfQ-0qeq-xMuu-yynx-wZA0-qTMt3x
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| [4] | Output reports of Volume Groups |
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[root@dlp ~]# vgs VG #PV #LV #SN Attr VSize VFree vg_data 1 0 0 wz--n- 100.00g 100.00g vg_dlp 1 3 0 wz--n- 29.51g 0 |
| [5] | Scan Volume Groups |
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[root@dlp ~]# vgscan Reading all physical volumes. This may take a while... Found volume group "vg_data" using metadata type lvm2 Found volume group "vg_dlp" using metadata type lvm2 |
| [6] | Extend a Volume Group |
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[root@dlp ~]# vgextend vg_data /dev/sdc1 # add sdc1 in vg_data Volume group "vg_data" successfully extended [root@dlp ~]# vgdisplay --- 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 199.99 GiB PE Size 4.00 MB Total PE 51198 Alloc PE / Size 0 / 0 Free PE / Size 51198 / 199.99 GiB VG UUID eoFugC-cEfQ-0qeq-xMuu-yynx-wZA0-qTMt3x |
| [7] | Reduce a Volume Group |
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[root@dlp ~]# vgreduce vg_data /dev/sdc1 # remove sdc1 from vg_data Removed "/dev/sdd1" from volume group "vg_data" [root@dlp ~]# vgdisplay --- Volume group --- VG Name vg_data System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 5 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 100.00 GiB PE Size 4.00 MB Total PE 25599 Alloc PE / Size 0 / 0 Free PE / Size 25599 / 100.00 GiB VG UUID eoFugC-cEfQ-0qeq-xMuu-yynx-wZA0-qTMt3x |
| [8] | Remove a Volume Group |
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[root@dlp ~]# vgchange -a n vg_data # turn non-active first 0 logical volume(s) in volume group "vg_data" now active [root@dlp ~]# vgremove vg_data # remove vg_data Volume group "vg_data" successfully removed |