LVM problems: pvmove "errors"

[michael <cs@xxxxxxxxxxxxxxxxxxxxxxxxxxx>]

I'm trying to reduce a logical vol so that I can remove a HD from it.  
However, I get errors with pvmove but I don't know why:

chris@veri:~$ sudo /usr/sbin/pvdisplay /dev/sdb1
Password:
  --- Physical volume ---
  PV Name               /dev/sdb1
  VG Name               VolGroup00
  PV Size               698.64 GB / not usable 10.34 MB
  Allocatable           yes
  PE Size (KByte)       32768
  Total PE              22356
  Free PE               19156
  Allocated PE          3200
  PV UUID               xDWUQB-wdEx-AtEs-YFkh-BKBR-7Jgd-9ik3p0


chris@veri:~$ sudo /usr/sbin/pvdisplay /dev/sda2
  --- Physical volume ---
  PV Name               /dev/sda2
  VG Name               VolGroup00
  PV Size               465.66 GB / not usable 3.56 MB
  Allocatable           yes
  PE Size (KByte)       32768
  Total PE              14901
  Free PE               14839
  Allocated PE          62
  PV UUID               GLGcHf-b3Ga-M61f-okkW-HaAk-Al7P-leVK91


chris@veri:~$ sudo /usr/sbin/pvmove /dev/sdb1
  Failure parsing mirror status fraction: 1 core
  Failure parsing mirror status fraction: 1 core
  ABORTING: Mirror percentage check failed.