OpenStack: Creating a Cinder Volume Failed

Issue

Tried to create a new volume with cinder and it failed, with no indication that it failed from lack of storage space. - The failure didn't show up until I listed information about the volume:

# cinder create --display-name=bigvol 25
...
# cinder list

+--------------------------------------+-----------+--------------+------+-------------+----------+-------------+
|                  ID                  |   Status  | Display Name | Size | Volume Type | Bootable | Attached to |
+--------------------------------------+-----------+--------------+------+-------------+----------+-------------+
| 78a852e2-7f02-4272-a2ac-ec08cbee854f |   error   |    bigvol    |  25  |     None    |          |             |
+--------------------------------------+-----------+--------------+------+-------------+----------+-------------+

# less /var/log/cinder/volume.log
...
2013-03-21 13:14:25 2556 TRACE cinder.openstack.common.rpc.amqp Command: sudo cinder-rootwrap /etc/cinder/rootwrap.conf lvcreate -L 25G -n volume-78a852e2-7f02-4272-a2ac-ec08cbee854f cinder-volumes
2013-03-21 13:14:25 2556 TRACE cinder.openstack.common.rpc.amqp Exit code: 5
2013-03-21 13:14:25 2556 TRACE cinder.openstack.common.rpc.amqp Stdout: ''
2013-03-21 13:14:25 2556 TRACE cinder.openstack.common.rpc.amqp Stderr: '  Volume group "cinder-volumes" has insufficient free space (5913 extents): 6400 required.\n'