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[linux-lvm] Cannot pvmove, Insufficient suitable contiguous allocatable extents



Hi,

I have been using LVM2 for a while now and I am very
pleased with it.  However, I have currently run into a
srtange limitation that I do not understand.  I have a
vg named 'data' and I would like to migrate the data
off of one of its partitions.  Unfortunately the
pvmove command will not let me, despite the fact that
I have plenty of free extents.  When I run pvmove, I
get:

pvmove /dev/hdc3
  Insufficient suitable contiguous allocatable extents
for logical volume pvmove0: 6250 more required
  Unable to allocate temporary LV for pvmove.

The pvdisplay for /dev/hdc3 gives:

 --- Physical volume ---
  PV Name               /dev/hdc3
  VG Name               data
  PV Size               33.30 GB / not usable 0
  Allocatable           yes
  PE Size (KByte)       4096
  Total PE              8526
  Free PE               484
  Allocated PE          8042
  PV UUID              
AheuvH-YyXp-83Hl-23JI-y7Kc-eTXt-rMLEm5

Only 8042 allocated PEs, tet, the vgdisplay data
gives:

  --- Volume group ---
  VG Name               data
  System ID
  Format                lvm2
  Metadata Areas        9
  Metadata Sequence No  80
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                26
  Open LV               22
  Max PV                0
  Cur PV                9
  Act PV                9
  VG Size               71.46 GB
  PE Size               4.00 MB
  Total PE              18293
  Alloc PE / Size       9061 / 35.39 GB
  Free  PE / Size       9232 / 36.06 GB
  VG UUID              
XLN0qj-39pm-RhwL-Ragk-KJoP-UZ0R-OWDSmA

As you can see, there are at least 9232 free extents,
more
than the 8042 allocated PEs from /dev/hdc3.

And a lvdisplay shows that all my logical volumes
have:
 Allocation             inherit

So, why is it looking for contiguous PEs?  What does
the inherit signify (I know it is not contiguous, but
it hardly seems like the opposite?)

How can I get the data off of my /dev/hdc3 partition?

Thanks for any insights,

-Martin



 
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