[root@localhost]# pvdisplay 
  /dev/nbd0: read failed after 0 of 4096 at 0: Input/output error
  /dev/nbd1: read failed after 0 of 4096 at 0: Input/output error
  /dev/nbd2: read failed after 0 of 4096 at 0: Input/output error
  /dev/nbd3: read failed after 0 of 4096 at 0: Input/output error
  /dev/nbd4: read failed after 0 of 4096 at 0: Input/output error
  /dev/nbd5: read failed after 0 of 4096 at 0: Input/output error
  /dev/nbd6: read failed after 0 of 4096 at 0: Input/output error
  /dev/nbd7: read failed after 0 of 4096 at 0: Input/output error
  /dev/nbd8: read failed after 0 of 4096 at 0: Input/output error
  /dev/nbd9: read failed after 0 of 4096 at 0: Input/output error
  /dev/nbd10: read failed after 0 of 4096 at 0: Input/output error
  /dev/nbd11: read failed after 0 of 4096 at 0: Input/output error
  /dev/nbd12: read failed after 0 of 4096 at 0: Input/output error
  /dev/nbd13: read failed after 0 of 4096 at 0: Input/output error
  /dev/nbd14: read failed after 0 of 4096 at 0: Input/output error
  /dev/nbd15: read failed after 0 of 4096 at 0: Input/output error
  --- Physical volume ---
  PV Name               /dev/hda8
  VG Name               myvol
  PV Size               2.70 GB / not usable 1009.00 KB
  Allocatable           yes (but full)
  PE Size (KByte)       4096
  Total PE              692
  Free PE               0
  Allocated PE          692
  PV UUID               1aR3jS-P9g1-TNmr-fxUN-n0vJ-uxB2-oBk3cB
   
  --- Physical volume ---
  PV Name               /dev/hda9
  VG Name               myvol
  PV Size               2.19 GB / not usable 3.42 MB
  Allocatable           yes (but full)
  PE Size (KByte)       4096
  Total PE              560
  Free PE               0
  Allocated PE          560
  PV UUID               6rrocO-16gO-3j8i-q7PO-FRUz-LhEX-JjIgZw
   
  --- Physical volume ---
  PV Name               /dev/hda10
  VG Name               myvol
  PV Size               2.21 GB / not usable 2.95 MB
  Allocatable           yes (but full)
  PE Size (KByte)       4096
  Total PE              566
  Free PE               0
  Allocated PE          566
  PV UUID               0WiMHF-kEzt-rpXQ-rgbJ-Yvv0-Acrn-tJeVMk
   
  --- Physical volume ---
  PV Name               /dev/hda1
  VG Name               myvol
  PV Size               1.93 GB / not usable 734.00 KB
  Allocatable           yes 
  PE Size (KByte)       4096
  Total PE              494
  Free PE               187
  Allocated PE          307
  PV UUID               Retf1b-Ia70-K5K1-DYm2-vFaM-QX5u-Rq3cdE