additionals:

I have probbed the SR using CLI commands. here are the results: I am not able to receive the SCSIid back from the Target.

[root@PCCO-XEN01 ~]#
[root@PCCO-XEN01 ~]# xe sr-probe type=lvmoiscsi device-config:target=10.33.2.12 device-config:targetIQN=iqn.2011-11:dss.target0
There was an SR backend failure.
status: non-zero exit
stdout:
stderr: Traceback (most recent call last):
File "/opt/xensource/sm/LVMoISCSISR", line 378, in ?
SRCommand.run(LVHDoISCSISR, DRIVER_INFO)
File "/opt/xensource/sm/SRCommand.py", line 244, in run
sr = driver(cmd, cmd.sr_uuid)
File "/opt/xensource/sm/SR.py", line 128, in __init__
self.load(sr_uuid)
File "/opt/xensource/sm/LVMoISCSISR", line 75, in load
iscsi = driver(self.original_srcmd, sr_uuid)
File "/opt/xensource/sm/SR.py", line 128, in __init__
self.load(sr_uuid)
File "/opt/xensource/sm/util.py", line 1135, in transform
return func(inst, *args, **kwargs)
File "/opt/xensource/sm/ISCSISR.py", line 167, in load
self._initPaths()
File "/opt/xensource/sm/ISCSISR.py", line 170, in _initPaths
self._init_adapters()
File "/opt/xensource/sm/ISCSISR.py", line 236, in _init_adapters
self.devs = scsiutil.cacheSCSIidentifiers()
File "/opt/xensource/sm/scsiutil.py", line 129, in cacheSCSIidentifiers
line = "NONE %s %s %s %s 0 %s" % \
IndexError: list index out of range