Description of problem:

Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:
1. Have 1 VM
2. Add a disk to the VM with 'wipe after delete'
3. Remove the disk
  
Actual results:
The deletion of the disk fails 

Expected results:
DEletion of the disk should work

Additional info:


Thread-97254::DEBUG::2013-03-06 08:40:50,545::lvm::447::OperationMutex::(_reloadlvs) Operation 'lvm reload operation' released the operation mutex
c37b977a-b45c-4324-9ff1-780b3113cccb::DEBUG::2013-03-06 08:40:50,546::lvm::498::OperationMutex::(_invalidatelvs) Operation 'lvm invalidate operation' got the operation mutex
66682964-5334-4e4d-af80-b95f5e4a9b14::DEBUG::2013-03-06 08:40:50,548::lvm::498::OperationMutex::(_invalidatelvs) Got the operational mutex
c37b977a-b45c-4324-9ff1-780b3113cccb::DEBUG::2013-03-06 08:40:50,548::blockSD::224::Storage.BlockSD::(zeroImgVolumes) Ignoring failed permission change: General Storage Exception
: ('5 [] [\'  Logical volume "77927e81-5ed1-4fc5-8b21-ffc5a2133768" is already writable\']\nc9a85789-053b-4781-8c20-2f30adb1c995/{\'77927e81-5ed1-4fc5-8b21-ffc5a2133768\': ImgsPa
r(imgs=(\'dfbaaf32-e963-4aa8-a7bb-c712bc6812b9\',), parent=\'00000000-0000-0000-0000-000000000000\')}',)
66682964-5334-4e4d-af80-b95f5e4a9b14::DEBUG::2013-03-06 08:40:50,550::lvm::510::OperationMutex::(_invalidatelvs) Operation 'lvm invalidate operation' released the operation mutex
c37b977a-b45c-4324-9ff1-780b3113cccb::ERROR::2013-03-06 08:40:50,551::task::833::TaskManager.Task::(_setError) Task=`c37b977a-b45c-4324-9ff1-780b3113cccb`::Unexpected error
Traceback (most recent call last):
  File "/usr/share/vdsm/storage/task.py", line 840, in _run
    return fn(*args, **kargs)
  File "/usr/share/vdsm/storage/task.py", line 307, in run
    return self.cmd(*self.argslist, **self.argsdict)
  File "/usr/share/vdsm/storage/blockSD.py", line 963, in zeroImage
    zeroImgVolumes(sdUUID, imgUUID, toZero)
  File "/usr/share/vdsm/storage/blockSD.py", line 229, in zeroImgVolumes
    proc = _zeroVolume(sdUUID, volUUID)
  File "/usr/share/vdsm/storage/blockSD.py", line 191, in _zeroVolume
    cmd = tuple(constants.CMD_LOWPRIO)