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Is this a bug perhaps?  I have a volume and a VM, I can attach the volume to the VM and see the disk with fdisk -l, I can detach the volume and see it is missing.  When I try to reattach the volume I get the following error:

May  2 12:18:01 compute-4 ERROR nova.compute.manager [instance: 4fcd874f-f8e5-4a08-9745-838b0636bd83]  Failed to attach volume 2e307a3d-3635-432d-99ed-6e8ddddf5792 at /dev/vdc
0122013-05-02 12:18:01,209 30214 TRACE nova.compute.manager [instance: 4fcd874f-f8e5-4a08-9745-838b0636bd83] Traceback (most recent call last):
0122013-05-02 12:18:01,209 30214 TRACE nova.compute.manager [instance: 4fcd874f-f8e5-4a08-9745-838b0636bd83]   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 2039, in _attach_volume
0122013-05-02 12:18:01,209 30214 TRACE nova.compute.manager [instance: 4fcd874f-f8e5-4a08-9745-838b0636bd83]     mountpoint)
0122013-05-02 12:18:01,209 30214 TRACE nova.compute.manager [instance: 4fcd874f-f8e5-4a08-9745-838b0636bd83]   File "/usr/lib/python2.7/dist-packages/nova/exception.py", line 104, in wrapped
0122013-05-02 12:18:01,209 30214 TRACE nova.compute.manager [instance: 4fcd874f-f8e5-4a08-9745-838b0636bd83]     temp_level, payload)
0122013-05-02 12:18:01,209 30214 TRACE nova.compute.manager [instance: 4fcd874f-f8e5-4a08-9745-838b0636bd83]   File "/usr/lib/python2.7/contextlib.py", line 24, in __exit__
0122013-05-02 12:18:01,209 30214 TRACE nova.compute.manager [instance: 4fcd874f-f8e5-4a08-9745-838b0636bd83]     self.gen.next()
0122013-05-02 12:18:01,209 30214 TRACE nova.compute.manager [instance: 4fcd874f-f8e5-4a08-9745-838b0636bd83]   File "/usr/lib/python2.7/dist-packages/nova/exception.py", line 79, in wrapped
0122013-05-02 12:18:01,209 30214 TRACE nova.compute.manager [instance: 4fcd874f-f8e5-4a08-9745-838b0636bd83]     return f(*args, **kw)
0122013-05-02 12:18:01,209 30214 TRACE nova.compute.manager [instance: 4fcd874f-f8e5-4a08-9745-838b0636bd83]   File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 673, in attach_volume
0122013-05-02 12:18:01,209 30214 TRACE nova.compute.manager [instance: 4fcd874f-f8e5-4a08-9745-838b0636bd83]     mount_device)

Does anyone else have this issue?