Hello, everyone. I tried to export a vm as OVA. I got a error in webui:
VDSM ovirt1.ntbaobei.com command HSMGetAllTasksStatusesVDS failed: Volume Group not big enough: (u'Not enough free extents for extending LV d9f2378f-92f0-4bc1-96a8-20a0f2c575cb/c515a3f9-0590-4ebe-81c5-9d0993f1fec9 (free=848, needed=872)',)

seems no enough space in the storage domain.
I deleted the vm which i wanted to export as OVA before, but I saw a disk with id 8140d2e7-6908-438e-a646-23e58a33913e left in the storage and the status is locked. 

here's some log in the engine.log:
2018-09-17 14:27:03,467+08 INFO  [org.ovirt.engine.core.vdsbroker.irsbroker.CopyImageVDSCommand] (EE-ManagedThreadFactory-engine-Thread-107849) [a407f6a9-445d-4ccc-b998-f9dfc6dc67ec] START, CopyImageVDSCommand( CopyImageVDSCommandParameters:{storagePoolId='79432500-ad45-11e8-98f3-00163e188641', ignoreFailoverLimit='false', storageDomainId='d9f2378f-92f0-4bc1-96a8-20a0f2c575cb', imageGroupId='ee55bbe7-8001-4c82-b1a6-0cac7710704b', imageId='701a7472-8c00-4b9f-aa87-4837eb128695', dstImageGroupId='8140d2e7-6908-438e-a646-23e58a33913e', vmId='b3aa623e-3072-430e-87d6-b81a3b07f466', dstImageId='c515a3f9-0590-4ebe-81c5-9d0993f1fec9', imageDescription='', dstStorageDomainId='d9f2378f-92f0-4bc1-96a8-20a0f2c575cb', copyVolumeType='LeafVol', volumeFormat='COW', preallocate='Sparse', postZero='false', discard='false', force='true'}), log id: 164e3046
2018-09-17 14:27:03,467+08 INFO  [org.ovirt.engine.core.vdsbroker.irsbroker.CopyImageVDSCommand] (EE-ManagedThreadFactory-engine-Thread-107849) [a407f6a9-445d-4ccc-b998-f9dfc6dc67ec] ++ dstImageGUID=8140d2e7-6908-438e-a646-23e58a33913e

I think maybe some command did not been excuted after I export the vm as OVA. I can find the similar case here:
https://access.redhat.com/solutions/1298893 

I have used the tool  unlock_entity.sh but cannot find any disk that is locked.
So what should I do to delete the disk that is been locked?

        

yours Adam