CentOS Stream 9
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LVM : Manage Phisical Volumes
2022/07/07
 
This is the basic operation of managing Phisical Volumes.
[1] If target disk is a new installed disk, create a partition and set LVM before managing Phisical Volumes.
For the example below, it creates GPT type partiton 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 Phisical 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 Phisical Volumes.
[root@dlp ~]#
pvdisplay /dev/sdb1

  "/dev/sdb1" is a new physical volume of "<80.00 GiB"
  --- 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               ZbbE4f-1VUZ-dP5c-jpUO-sxRk-nt8d-dTJkdq
[3] Change size of Phisical 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

  "/dev/sdb1" is a new physical volume of "50.00 GiB"
  --- 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               ZbbE4f-1VUZ-dP5c-jpUO-sxRk-nt8d-dTJkdq
[4] Display reports of Phisical Volumes.
[root@dlp ~]#
pvs /dev/sdb1

  PV         VG Fmt  Attr PSize  PFree
  /dev/sdb1     lvm2 ---  50.00g 50.00g
[5] Scan Phisical Volumes.
[root@dlp ~]#
pvscan

  PV /dev/vda2   VG cs              lvm2 [<79.00 GiB / 116.00 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 Phisical 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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