[Users] Issue with disk after importing a VM

I import a VM to a second data center.The VM has 2 disks.On Admin Portal,one of the disks shows illegal status,but I have no problem accessing this disk from the VM. Could someone give me pointers on what went wrong? Appreciate your help. Thanks, Marcelo Log from engine.log 2013-05-15 12:14:52,994 INFO [org.ovirt.engine.core.bll.RemoveImageCommand] (pool-3-thread-50) [3dbbb4e3] Running command: RemoveImageCommand internal: true. Entities affected : ID: 00000000-0000-0000-0000-000000000000 Type: Storage 2013-05-15 12:14:52,997 INFO [org.ovirt.engine.core.vdsbroker.irsbroker.DeleteImageGroupVDSCommand] (pool-3-thread-50) [1xxxxxxx] START, DeleteImageGroupVDSCommand( storagePoolId =sp ID, ignoreFailoverLimit = false, compatabilityVersion = 3.1, storageDomainId = pqrpqr-xxxx-xxxx-xxxxx-xxx, imageGroupId = abcabc-xxx-xxx-xxx-xxxx, postZeros = false, forceDelete = false), log id: 566629ec 2013-05-15 12:14:53,254 ERROR [org.ovirt.engine.core.vdsbroker.irsbroker.IrsBrokerCommand] (pool-3-thread-50) [1xxxxxx] IrsBroker::Failed::DeleteImageGroupVDS due to: IrsOperationFailedNoFailoverException: IRSGenericException: IRSErrorException: Could not remove all image's volumes: (""abcabc-xxx-xxx-xxx-xxxx [Errno 39] Directory not empty: '/rhev/data-center/mnt/IP:export/<SDUID>/images/_remoiqXphA'",) 2013-05-15 12:14:53,255 INFO [org.ovirt.engine.core.vdsbroker.irsbroker.DeleteImageGroupVDSCommand] (pool-3-thread-50) [1xxxxxx] FINISH, DeleteImageGroupVDSCommand, log id: 566629ec 2013-05-15 12:14:53,255 ERROR [org.ovirt.engine.core.bll.RemoveImageCommand] (pool-3-thread-50) [3dbbb4e3] Command org.ovirt.engine.core.bll.RemoveImageCommand throw Vdc Bll exception. With error message VdcBLLException: org.ovirt.engine.core.vdsbroker.irsbroker.IrsOperationFailedNoFailoverException: IRSGenericException: IRSErrorException: Could not remove all image's volumes: ("abcabc-xxx-xxx-xxx-xxxx [Errno 39] Directory not empty: '/rhev/data-center/mnt/IP:export/<SDUID>/images/_remoiqXphA'",) 2013-05-15 12:14:53,260 ERROR [org.ovirt.engine.core.bll.RemoveAllVmImagesCommand] (pool-3-thread-50) [1xxxxxx] Cant remove image id: xyzxyz-xxx-xxxx-xxxx-xxxx for VM id: due to: ImageDeleteError. Image will be set at illegal state with no snapshot id.