root@domU-fileserver ~# vgchange -a y /dev/vg01
  device-mapper ioctl cmd 9 failed: Invalid argument
  Couldn't load device 'vg01-lvol00'.
  device-mapper ioctl cmd 9 failed: Invalid argument
  Couldn't load device 'vg01-lvol01'.
  device-mapper ioctl cmd 9 failed: Invalid argument
  Couldn't load device 'vg01-lvol02'.
  device-mapper ioctl cmd 9 failed: Invalid argument
  Couldn't load device 'vg01-lvol03'.
  device-mapper ioctl cmd 9 failed: Invalid argument
  Couldn't load device 'vg01-lvol04'.
  device-mapper ioctl cmd 9 failed: Invalid argument
  Couldn't load device 'vg01-lvol05'.
  device-mapper ioctl cmd 9 failed: Invalid argument
  Couldn't load device 'vg01-lvol06'.
  device-mapper ioctl cmd 9 failed: Invalid argument
  Couldn't load device 'vg01-lvol07'.
  device-mapper ioctl cmd 9 failed: Invalid argument
  Couldn't load device 'vg01-lvol08'.
  device-mapper ioctl cmd 9 failed: Invalid argument
  Couldn't load device 'vg01-lvol09'. # <- this sucks
  10 logical volume(s) in volume group "vg01" now active # <- this is insulting.