This is what I got:

Error in GUI: Cannot add Storage. Internal error, Storage Connection doesn't exist.

Permissions:
ls -la /media/ceva2/Ovirt/Storage/
total 8
drwxrwxr-x. 2 vdsm kvm 4096 Nov  6 09:04 .
drwxr-xr-x. 5 vdsm kvm 4096 Nov  2 10:55 ..

df | grep /media/ceva2
/dev/mapper/1ATA_WDC_WD2500BB-00GUA0_WD-WCAL73625324p2 144237688 124962468  11948376  92% /media/ceva2


This is with the latest nightly on ovirt and vdsm.

This is the error from vdsm:


Thread-366::DEBUG::2012-11-08 08:31:41,244::BindingXMLRPC::161::vds::(wrapper) [79.112.94.67]
Thread-366::DEBUG::2012-11-08 08:31:41,244::task::568::TaskManager.Task::(_updateState) Task=`2b324a0a-96ef-4ecd-8ad3-b8588ed93fd5`::moving from state init -> state preparing
Thread-366::INFO::2012-11-08 08:31:41,245::logUtils::37::dispatcher::(wrapper) Run and protect: validateStorageServerConnection(domType=4, spUUID='00000000-0000-0000-0000-000000000000', conList=[{'connection': '/media/ceva2/Ovirt/Storage', 'iqn': '', 'portal': '', 'user': '', 'password': '******', 'id': '00000000-0000-0000-0000-000000000000', 'port': ''}], options=None)
Thread-366::INFO::2012-11-08 08:31:41,245::logUtils::39::dispatcher::(wrapper) Run and protect: validateStorageServerConnection, Return response: {'statuslist': [{'status': 0, 'id': '00000000-0000-0000-0000-000000000000'}]}
Thread-366::DEBUG::2012-11-08 08:31:41,245::task::1151::TaskManager.Task::(prepare) Task=`2b324a0a-96ef-4ecd-8ad3-b8588ed93fd5`::finished: {'statuslist': [{'status': 0, 'id': '00000000-0000-0000-0000-000000000000'}]}
Thread-366::DEBUG::2012-11-08 08:31:41,245::task::568::TaskManager.Task::(_updateState) Task=`2b324a0a-96ef-4ecd-8ad3-b8588ed93fd5`::moving from state preparing -> state finished
Thread-366::DEBUG::2012-11-08 08:31:41,245::resourceManager::809::ResourceManager.Owner::(releaseAll) Owner.releaseAll requests {} resources {}
Thread-366::DEBUG::2012-11-08 08:31:41,245::resourceManager::844::ResourceManager.Owner::(cancelAll) Owner.cancelAll requests {}
Thread-366::DEBUG::2012-11-08 08:31:41,246::task::957::TaskManager.Task::(_decref) Task=`2b324a0a-96ef-4ecd-8ad3-b8588ed93fd5`::ref 0 aborting False
Thread-367::DEBUG::2012-11-08 08:31:41,304::BindingXMLRPC::161::vds::(wrapper) [79.112.94.67]
Thread-367::DEBUG::2012-11-08 08:31:41,305::task::568::TaskManager.Task::(_updateState) Task=`2844a5a4-7148-4d44-858c-fc75abab1a5f`::moving from state init -> state preparing
Thread-367::INFO::2012-11-08 08:31:41,305::logUtils::37::dispatcher::(wrapper) Run and protect: connectStorageServer(domType=4, spUUID='00000000-0000-0000-0000-000000000000', conList=[{'connection': '/media/ceva2/Ovirt/Storage', 'iqn': '', 'portal': '', 'user': '', 'password': '******', 'id': '00000000-0000-0000-0000-000000000000', 'port': ''}], options=None)
Thread-367::ERROR::2012-11-08 08:31:41,430::hsm::2057::Storage.HSM::(connectStorageServer) Could not connect to storageServer
Traceback (most recent call last):
  File "/usr/share/vdsm/storage/hsm.py", line 2054, in connectStorageServer
    conObj.connect()
  File "/usr/share/vdsm/storage/storageServer.py", line 462, in connect
    if not self.checkTarget():
  File "/usr/share/vdsm/storage/storageServer.py", line 449, in checkTarget
    fileSD.validateDirAccess(self._path))
  File "/usr/share/vdsm/storage/fileSD.py", line 51, in validateDirAccess
    getProcPool().fileUtils.validateAccess(dirPath)
  File "/usr/share/vdsm/storage/remoteFileHandler.py", line 277, in callCrabRPCFunction
    *args, **kwargs)
  File "/usr/share/vdsm/storage/remoteFileHandler.py", line 180, in callCrabRPCFunction
    rawLength = self._recvAll(LENGTH_STRUCT_LENGTH, timeout)
  File "/usr/share/vdsm/storage/remoteFileHandler.py", line 149, in _recvAll
    timeLeft):
  File "/usr/lib64/python2.7/contextlib.py", line 84, in helper
    return GeneratorContextManager(func(*args, **kwds))
  File "/usr/share/vdsm/storage/remoteFileHandler.py", line 136, in _poll
    raise Timeout()
Timeout
Thread-367::INFO::2012-11-08 08:31:41,432::logUtils::39::dispatcher::(wrapper) Run and protect: connectStorageServer, Return response: {'statuslist': [{'status': 100, 'id': '00000000-0000-0000-0000-000000000000'}]}
Thread-367::DEBUG::2012-11-08 08:31:41,433::task::1151::TaskManager.Task::(prepare) Task=`2844a5a4-7148-4d44-858c-fc75abab1a5f`::finished: {'statuslist': [{'status': 100, 'id': '00000000-0000-0000-0000-000000000000'}]}
Thread-367::DEBUG::2012-11-08 08:31:41,433::task::568::TaskManager.Task::(_updateState) Task=`2844a5a4-7148-4d44-858c-fc75abab1a5f`::moving from state preparing -> state finished
Thread-367::DEBUG::2012-11-08 08:31:41,434::resourceManager::809::ResourceManager.Owner::(releaseAll) Owner.releaseAll requests {} resources {}
Thread-367::DEBUG::2012-11-08 08:31:41,434::resourceManager::844::ResourceManager.Owner::(cancelAll) Owner.cancelAll requests {}
Thread-367::DEBUG::2012-11-08 08:31:41,435::task::957::TaskManager.Task::(_decref) Task=`2844a5a4-7148-4d44-858c-fc75abab1a5f`::ref 0 aborting False
Thread-370::DEBUG::2012-11-08 08:31:41,784::BindingXMLRPC::161::vds::(wrapper) [79.112.94.67]
Thread-370::DEBUG::2012-11-08 08:31:41,784::task::568::TaskManager.Task::(_updateState) Task=`aa8526b6-0772-4909-bad3-b2cd7ad589cc`::moving from state init -> state preparing
Thread-370::INFO::2012-11-08 08:31:41,784::logUtils::37::dispatcher::(wrapper) Run and protect: disconnectStorageServer(domType=4, spUUID='00000000-0000-0000-0000-000000000000', conList=[{'connection': '/media/ceva2/Ovirt/Storage', 'iqn': '', 'portal': '', 'user': '', 'password': '******', 'id': '00000000-0000-0000-0000-000000000000', 'port': ''}], options=None)
Thread-370::DEBUG::2012-11-08 08:31:41,785::misc::1026::SamplingMethod::(__call__) Trying to enter sampling method (storage.sdc.refreshStorage)
Thread-370::DEBUG::2012-11-08 08:31:41,785::misc::1028::SamplingMethod::(__call__) Got in to sampling method
Thread-370::DEBUG::2012-11-08 08:31:41,785::misc::1026::SamplingMethod::(__call__) Trying to enter sampling method (storage.iscsi.rescan)
Thread-370::DEBUG::2012-11-08 08:31:41,785::misc::1028::SamplingMethod::(__call__) Got in to sampling method
Thread-370::DEBUG::2012-11-08 08:31:41,785::misc::84::Storage.Misc.excCmd::(<lambda>) '/bin/sudo -n /sbin/iscsiadm -m session -R' (cwd None)
Thread-370::DEBUG::2012-11-08 08:31:41,810::misc::84::Storage.Misc.excCmd::(<lambda>) FAILED: <err> = 'iscsiadm: No session found.\n'; <rc> = 21
Thread-370::DEBUG::2012-11-08 08:31:41,811::misc::1036::SamplingMethod::(__call__) Returning last result
MainProcess|Thread-370::DEBUG::2012-11-08 08:31:41,814::misc::84::Storage.Misc.excCmd::(<lambda>) '/bin/dd of=/sys/class/scsi_host/host0/scan' (cwd None)
MainProcess|Thread-370::DEBUG::2012-11-08 08:31:41,817::misc::84::Storage.Misc.excCmd::(<lambda>) '/bin/dd of=/sys/class/scsi_host/host1/scan' (cwd None)
MainProcess|Thread-370::DEBUG::2012-11-08 08:31:41,820::misc::84::Storage.Misc.excCmd::(<lambda>) '/bin/dd of=/sys/class/scsi_host/host2/scan' (cwd None)
MainProcess|Thread-370::DEBUG::2012-11-08 08:31:41,822::misc::84::Storage.Misc.excCmd::(<lambda>) '/bin/dd of=/sys/class/scsi_host/host3/scan' (cwd None)
MainProcess|Thread-370::DEBUG::2012-11-08 08:31:42,827::misc::84::Storage.Misc.excCmd::(<lambda>) '/bin/dd of=/sys/class/scsi_host/host4/scan' (cwd None)
MainProcess|Thread-370::DEBUG::2012-11-08 08:31:42,835::misc::84::Storage.Misc.excCmd::(<lambda>) '/bin/dd of=/sys/class/scsi_host/host5/scan' (cwd None)
MainProcess|Thread-370::DEBUG::2012-11-08 08:31:42,842::iscsi::388::Storage.ISCSI::(forceIScsiScan) Performing SCSI scan, this will take up to 30 seconds
Thread-370::DEBUG::2012-11-08 08:31:44,846::misc::84::Storage.Misc.excCmd::(<lambda>) '/bin/sudo -n /sbin/multipath' (cwd None)
Thread-370::DEBUG::2012-11-08 08:31:44,902::misc::84::Storage.Misc.excCmd::(<lambda>) SUCCESS: <err> = ''; <rc> = 0
Thread-370::DEBUG::2012-11-08 08:31:44,903::lvm::477::OperationMutex::(_invalidateAllPvs) Operation 'lvm invalidate operation' got the operation mutex
Thread-370::DEBUG::2012-11-08 08:31:44,904::lvm::479::OperationMutex::(_invalidateAllPvs) Operation 'lvm invalidate operation' released the operation mutex
Thread-370::DEBUG::2012-11-08 08:31:44,905::lvm::488::OperationMutex::(_invalidateAllVgs) Operation 'lvm invalidate operation' got the operation mutex
Thread-370::DEBUG::2012-11-08 08:31:44,905::lvm::490::OperationMutex::(_invalidateAllVgs) Operation 'lvm invalidate operation' released the operation mutex
Thread-370::DEBUG::2012-11-08 08:31:44,906::lvm::508::OperationMutex::(_invalidateAllLvs) Operation 'lvm invalidate operation' got the operation mutex
Thread-370::DEBUG::2012-11-08 08:31:44,906::lvm::510::OperationMutex::(_invalidateAllLvs) Operation 'lvm invalidate operation' released the operation mutex
Thread-370::DEBUG::2012-11-08 08:31:44,907::misc::1036::SamplingMethod::(__call__) Returning last result
Thread-370::INFO::2012-11-08 08:31:44,907::logUtils::39::dispatcher::(wrapper) Run and protect: disconnectStorageServer, Return response: {'statuslist': [{'status': 0, 'id': '00000000-0000-0000-0000-000000000000'}]}
Thread-370::DEBUG::2012-11-08 08:31:44,908::task::1151::TaskManager.Task::(prepare) Task=`aa8526b6-0772-4909-bad3-b2cd7ad589cc`::finished: {'statuslist': [{'status': 0, 'id': '00000000-0000-0000-0000-000000000000'}]}
Thread-370::DEBUG::2012-11-08 08:31:44,908::task::568::TaskManager.Task::(_updateState) Task=`aa8526b6-0772-4909-bad3-b2cd7ad589cc`::moving from state preparing -> state finished
Thread-370::DEBUG::2012-11-08 08:31:44,909::resourceManager::809::ResourceManager.Owner::(releaseAll) Owner.releaseAll requests {} resources {}
Thread-370::DEBUG::2012-11-08 08:31:44,909::resourceManager::844::ResourceManager.Owner::(cancelAll) Owner.cancelAll requests {}
Thread-370::DEBUG::2012-11-08 08:31:44,910::task::957::TaskManager.Task::(_decref) Task=`aa8526b6-0772-4909-bad3-b2cd7ad589cc`::ref 0 aborting False