Unable to Create LVM-Based VM in Xen on CentOS due to "Insufficient free extents"

[N9XCR]

I installed CentOS on a Dell PowerEdge 860 with two 1TB hard drives in RAID1. This is a bare minimum install. I then installed Xen according to "Paravirtualization With Xen On CentOS 5.4 (x86_64)". Here is the output from vgdisplay and lvdisplay:

[root@serenity ~]# vgdisplay
  /dev/hda: open failed: No medium found
  --- Volume group ---
  VG Name               VolGroup00
  System ID
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  3
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                2
  Open LV               2
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               931.22 GB
  PE Size               32.00 MB
  Total PE              29799
  Alloc PE / Size       29799 / 931.22 GB
  Free  PE / Size       0 / 0
  VG UUID               Pt8lYt-vBDe-BGHH-82ee-S1qI-Rc7q-ZfKw0y

[root@serenity ~]# lvdisplay
  /dev/hda: open failed: No medium found
  --- Logical volume ---
  LV Name                /dev/VolGroup00/LogVol00
  VG Name                VolGroup00
  LV UUID                dNRrkh-cgaZ-ak68-wcXY-wydS-xGIV-taAOJl
  LV Write Access        read/write
  LV Status              available
  # open                 1
  LV Size                921.47 GB
  Current LE             29487
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:0

  --- Logical volume ---
  LV Name                /dev/VolGroup00/LogVol01
  VG Name                VolGroup00
  LV UUID                s6effT-hVcu-ICBP-NL18-2yoh-Dvba-76A5fA
  LV Write Access        read/write
  LV Status              available
  # open                 1
  LV Size                9.75 GB
  Current LE             312
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:1

This is what happens when I try to create my first LVM-based VM.

[root@serenity ~]# lvcreate -L10G -n vm01 VolGroup00
  /dev/hda: open failed: No medium found
  Insufficient free extents (0) in volume group VolGroup00: 320 required

I know I did something wrong somewhere. Please point me in the right direction.

Thank you,
Chris

[falko]

There'S no free space left in VolGroup00 because it is used up by the volumes LogVol00 and LogVol01. You can try to resize the volumes as described in this tutorial: http://www.howtoforge.com/linux_lvm