[linux-lvm] LVM and Network Block Device

[Spam]

  Hello,

  How can I make lvm to recognize my network block devices? They are
  listed in /dev/nbd/* and I can access them fine with fdisk or dd.

  But when I try pvdisplay /dev/nbd/0 I get the following error:

  pvdisplay - ERROR "pv_read(): pv_create_name_from_kdev_t" no VALID
              physical volume "/dev/nbd/0"

  I get no errors in the logs either so I am not sure where to start.

  From what I see lvmdiskscan etc looks in /proc/partitions and never
  scans /dev/ for valid blockdevices?
  
  Thanks for any input,
  Anders