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Lvm
Mounting a Linux LVM volume You do not mount a partition of type "Linux LVM" the same way you mount a partition using a standard Linux file system (e.g. ext2, ext3).
$ fdisk -l /dev/hda
Disk /dev/hda: 160.0 GB, 160041885696 bytes 255 heads, 63 sectors/track, 19457 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/hda1 * 1 13 104391 83 Linux /dev/hda2 14 19457 156183930 8e Linux LVM
mount /dev/hda2 /tmp/mnt
mount: /dev/hda2 already mounted or /tmp/mnt busy
First, let's determine the volume group containing the physical volume /dev/hda2.
$ pvs
PV VG Fmt Attr PSize PFree /dev/hda2 VolGroup01 lvm2 a- 148.94G 32.00M /dev/hdb2 VolGroup00 lvm2 a- 114.94G 96.00M
Next, let's list the logical volumes in VolGroup01.
$ lvdisplay /dev/VolGroup01
- – Logical volume —
LV Name /dev/VolGroup01/LogVol00
VG Name VolGroup01 LV UUID zOQogm-G8I7-a4WC-T7KI-AhWe-Ex3Y-JVzFcR LV Write Access read/write LV Status available # open 0 LV Size 146.97 GB Current LE 4703 Segments 1 Allocation inherit Read ahead sectors 0 Block device 253:2 --- Logical volume --- LV Name /dev/VolGroup01/LogVol01 VG Name VolGroup01 LV UUID araUBI-4eer-uh5L-Dvnr-3bI6-4gYg-APgYy2 LV Write Access read/write LV Status available # open 0 LV Size 1.94 GB Current LE 62 Segments 1 Allocation inherit Read ahead sectors 0 Block device 253:3
The logical volume I would like to "mount" (in purely the computing-related sense) is /dev/VolGroup01/LogVol00. The other logical volume is a swap partition.
$ mount /dev/VolGroup01/LogVol00 /tmp/mnt
LVM logical volum 확장
vg 볼륨이 1000M 남아있고, lv 볼륨이 현재 100M 이다. 이때 lv 볼륨을 200M 로 확장할려고 한다. 현재 lvm 볼륨은 mount 되어 사용중이다. 온라인 상태에서 확장을 할려고 하는거다.
> lvextend -L +100M /dev/vg_data/lv_data ( 볼륨을 확장할 device 이름)
resize2fs /dev/vg_data/lv_data ( 온라인 상태에서 확장할 수 있는 명령어, RHEL 5 에서 사용가능)
df -h 명령어로 확인해 보면 mount 된 볼륨이 확장된걸 확인할 수 있다.