LVM : Manage Physical Volumes2021/03/08

	This is the basic operation of managing Physical Volumes.
[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".

Matched Content