LVM : Manage Physical Volumes2021/03/08 |
This is the basic operation of managing Physical Volumes.
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[1] | If target disk is a new installed disk, create a partition and set LVM before managing Physical Volumes. For the example below, it creates GPT type partition on the new disk [sdb] and set LVM to it. |
[root@dlp ~]# parted --script /dev/sdb "mklabel gpt" [root@dlp ~]# parted --script /dev/sdb "mkpart 'Linux LVM' 0% 100%" [root@dlp ~]# parted --script /dev/sdb "set 1 lvm on" |
[2] | Create Physical Volumes. |
[root@dlp ~]# pvcreate /dev/sdb1 Physical volume "/dev/sdb1" successfully created. # specify like follows if you'd like to specify volume size [root@dlp ~]# pvcreate --setphysicalvolumesize 50G /dev/sdb1 |
[2] | Display Physical Volumes. |
[root@dlp ~]# pvdisplay /dev/sdb1 --- NEW Physical volume --- PV Name /dev/sdb1 VG Name PV Size <80.00 GiB Allocatable NO PE Size 0 Total PE 0 Free PE 0 Allocated PE 0 PV UUID 5nwczh-NEgP-3iTx-46tr-ghRP-1u0K-M51zEO |
[3] | Change size of Physical Volumes. |
# change to 50G [root@dlp ~]# pvresize --setphysicalvolumesize 50G /dev/sdb1
/dev/sdb1: Requested size 50.00 GiB is less than real size <80.00 GiB. Proceed? [y/n]: y
WARNING: /dev/sdb1: Pretending size is 104857600 not 167768064 sectors.
Physical volume "/dev/sdb1" changed
1 physical volume(s) resized or updated / 0 physical volume(s) not resized
[root@dlp ~]# pvdisplay /dev/sdb1 --- NEW Physical volume --- PV Name /dev/sdb1 VG Name PV Size 50.00 GiB Allocatable NO PE Size 0 Total PE 0 Free PE 0 Allocated PE 0 PV UUID 5nwczh-NEgP-3iTx-46tr-ghRP-1u0K-M51zEO |
[4] | Display reports of Physical Volumes. |
[root@dlp ~]# pvs /dev/sdb1 PV VG Fmt Attr PSize PFree /dev/sdb1 lvm2 --- 50.00g 50.00g |
[5] | Scan Physical Volumes. |
[root@dlp ~]# pvscan PV /dev/sda2 VG cs lvm2 [<79.00 GiB / 96.00 MiB free] PV /dev/sdb1 lvm2 [50.00 GiB] Total: 2 [<129.00 GiB] / in use: 1 [<79.00 GiB] / in no VG: 1 [50.00 GiB] |
[6] | Delete Physical Volumes. |
[root@dlp ~]# pvremove /dev/sdb1 Labels on physical volume "/dev/sdb1" successfully wiped.[root@dlp ~]# pvdisplay /dev/sdb1 Failed to find physical volume "/dev/sdb1". |
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