lvdisplay

root@alpha:~# lvdisplay
  --- Logical volume ---
  LV Path                /dev/pve/swap
  LV Name                swap
  VG Name                pve
  LV UUID                QG10SB-S1yg-VKa4-0HZe-r8Jx-WQZ3-PoAPTk
  LV Write Access        read/write
  LV Creation host, time proxmox, 2018-09-11 10:54:43 +0400
  LV Status              available
  # open                 2
  LV Size                8.00 GiB
  Current LE             2048
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:0

  --- Logical volume ---
  LV Path                /dev/pve/root
  LV Name                root
  VG Name                pve
  LV UUID                wnkdfg-FS1Y-QXpD-LNz7-Wgtb-QP46-ias3yH
  LV Write Access        read/write
  LV Creation host, time proxmox, 2018-09-11 10:54:43 +0400
  LV Status              available
  # open                 1
  LV Size                96.00 GiB
  Current LE             24576
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:1

  --- Logical volume ---
  LV Name                data
  VG Name                pve
  LV UUID                r4glUF-rWq9-aCXj-gI8S-sOAX-bTcb-Hu10tE
  LV Write Access        read/write
  LV Creation host, time proxmox, 2018-09-11 10:54:44 +0400
  LV Pool metadata       data_tmeta
  LV Pool data           data_tdata
  LV Status              available
  # open                 3
  LV Size                418.02 GiB
  Allocated pool data    100.00%
  Allocated metadata     4.84%
  Current LE             107013
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:4

  --- Logical volume ---
  LV Path                /dev/pve/vm-100-disk-1
  LV Name                vm-100-disk-1
  VG Name                pve
  LV UUID                jw140G-Pxg2-uOjt-arLN-f1b2-FDpO-6hjogu
  LV Write Access        read/write
  LV Creation host, time alpha, 2018-09-11 18:48:10 +0400
  LV Pool name           data
  LV Status              available
  # open                 0
  LV Size                320.00 GiB
  Mapped size            99.43%
  Current LE             81920
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:6

  --- Logical volume ---
  LV Path                /dev/pve/vm-101-disk-1
  LV Name                vm-101-disk-1
  VG Name                pve
  LV UUID                fTwmTK-mu3q-7cWr-ISfp-Dv2S-mr1O-zfFEJN
  LV Write Access        read/write
  LV Creation host, time alpha, 2018-09-12 20:35:50 +0400
  LV Pool name           data
  LV Status              available
  # open                 0
  LV Size                100.00 GiB
  Mapped size            99.84%
  Current LE             25600
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:7