This assumes you are familiar with LVM (Logical Volume Manager). If not, check out my article Getting Started with LVM (Logical Volume Manager).

The vgdisplay command can be used to show the details of all of your LVM Volume Groups. Something like this should be returned.

[root@server1 ~]# vgdisplay
  --- Volume group ---
  VG Name               datavg
  System ID             
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  3
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                2
  Open LV               2
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               <25.00 GiB
  PE Size               4.00 MiB
  Total PE              6399
  Alloc PE / Size       6375 / 24.90 GiB
  Free  PE / Size       24 / 96.00 MiB
  VG UUID               3WU9Ms-Zo3j-EpMa-pATe-U78R-LcRL-tcM0m4
   
  --- Volume group ---
  VG Name               rootvg
  System ID             
  Format                lvm2
  Metadata Areas        2
  Metadata Sequence No  17
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                7
  Open LV               7
  Max PV                0
  Cur PV                2
  Act PV                2
  VG Size               54.99 GiB
  PE Size               4.00 MiB
  Total PE              14078
  Alloc PE / Size       11261 / <43.99 GiB
  Free  PE / Size       2817 / 11.00 GiB
  VG UUID               lXTHOm-BAff-igYk-5H3m-HL0J-77vt-ecphq0

Or, to display the details of a specific LVM Volume Group.

[root@server1 ~]# vgdisplay rootvg
  --- Volume group ---
  VG Name               rootvg
  System ID             
  Format                lvm2
  Metadata Areas        2
  Metadata Sequence No  17
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                7
  Open LV               7
  Max PV                0
  Cur PV                2
  Act PV                2
  VG Size               54.99 GiB
  PE Size               4.00 MiB
  Total PE              14078
  Alloc PE / Size       11261 / <43.99 GiB
  Free  PE / Size       2817 / 11.00 GiB
  VG UUID               lXTHOm-BAff-igYk-5H3m-HL0J-77vt-ecphq0