Pour voir les LVM, il faut utiliser les commandes :
pvscan :
  PV /dev/md4   VG vgade   lvm2 [465,76 GB / 15,75 GB free]
  Total: 1 [465,76 GB] / in use: 1 [465,76 GB] / in no VG: 0 [0   ]
vgdisplay :
  --- Volume group ---
  VG Name               vgade
  System ID             
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  8
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                3
  Open LV               2
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               465,76 GB
  PE Size               4,00 MB
  Total PE              119234
  Alloc PE / Size       115201 / 450,00 GB
  Free  PE / Size       4033 / 15,75 GB
  VG UUID               kKXyVG-aRNV-en6i-YtwJ-7Mlc-HPgu-wJ3LCL
lvdisplay :
  --- Logical volume ---
  LV Name                /dev/vgade/lm3
  VG Name                vgade
  LV UUID                hOYIqI-cz3a-ezyl-Ms3G-3T1K-uHee-VweAdL
  LV Write Access        read/write
  LV Status              available
  # open                 1
  LV Size                150,00 GB
  Current LE             38400
  Segments               1
  Allocation             inherit
  Read ahead sectors     0
  Block device           253:2