lvcreate.txt

# lvcreate -L 2G -n test system
  /dev/system/test: not found: device not cleared
  Aborting. Failed to wipe start of new LV.
  /dev/nbd2: BLKDISCARD ioctl at offset 1048576 size 2147483648 failed: Operation not supported.

pvdisplay.txt

# pvdisplay
  --- Physical volume ---
  PV Name               /dev/nbd2
  VG Name               system
  PV Size               139.70 GiB / not usable 3.14 MiB
  Allocatable           yes
  PE Size               4.00 MiB
  Total PE              35762
  Free PE               35762
  Allocated PE          0
  PV UUID               Aeagvu-PqQG-WKDn-eJ7j-3yhL-Vndr-7GKNYQ

  --- Physical volume ---
  PV Name               /dev/nbd3
  VG Name               system
  PV Size               139.70 GiB / not usable 3.14 MiB
  Allocatable           yes
  PE Size               4.00 MiB
  Total PE              35762
  Free PE               35762
  Allocated PE          0
  PV UUID               09iE01-oPfQ-0q8y-SML7-YQMN-H4HM-BQr3CW

vgdisplay.txt

# vgdisplay
  --- Volume group ---
  VG Name               system
  System ID
  Format                lvm2
  Metadata Areas        2
  Metadata Sequence No  5
  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               279.39 GiB
  PE Size               4.00 MiB
  Total PE              71524
  Alloc PE / Size       0 / 0
  Free  PE / Size       71524 / 279.39 GiB
  VG UUID               twbfAO-i9s7-8Ifr-anU0-kZdb-XGGr-pxBK5r