How to create Logical Volume from Volume Group in Linux

Question

Hi Guys,

I have created one Volume Group of 50GB. I want to create one Logical Volume of 40 GB from this. How can I do that?

Answer 1

Hi@akhtar,

You can use lvcreate command to create one Logical Volume from your VG. I have attached one example for your reference.

• I have one Volume Group of 60 GB as shown below.

[root@localhost ~]# vgdisplay myvg
  --- Volume group ---
  VG Name               myvg
  System ID
  Format                lvm2
  Metadata Areas        2
  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                2
  Act PV                2
  VG Size               59.99 GiB
  PE Size               4.00 MiB
  Total PE              15358
  Alloc PE / Size       0 / 0
  Free  PE / Size       15358 / 59.99 GiB
  VG UUID               AFeRlq-Uu1l-JkWp-5Dgh-DOfH-UCcH-eJbq1L

• From this, I have created one Logical Volume of 50GB.

[root@localhost ~]# lvcreate --size 50G --name mylv myvg
  Logical volume "mylv" created.
[root@localhost ~]# lvdisplay myvg/mylv
  --- Logical volume ---
  LV Path                /dev/myvg/mylv
  LV Name                mylv
  VG Name                myvg
  LV UUID                yEPJZN-5Ucq-sL2u-VEKU-Nlpt-iTMh-HrH2uf
  LV Write Access        read/write
  LV Creation host, time localhost.localdomain, 2020-07-08 14:08:36 -0400
  LV Status              available
  # open                 0
  LV Size                50.00 GiB
  Current LE             12800
  Segments               2
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     8192
  Block device           253:3

I hope this example will clear your doubt.