OK, tried something else just in case. Got rid of the IP address.
Then I used that in the "Host Name" field.
And here is the string I am using for the "Source Path" :
iqn.1986-03.com.sun:02:44ed42e5-747b-eb6c-9273-9cebdd051c64
It works fine with vbox manage - I use this command :
VBoxManage storageattach "UbuntuServer" --storagectl "IDE Controller Ubuntu Server" --port 0 --device 1 --type hdd --medium iscsi --server 192.168.160.250 --target iqn.1986-03.com.sun:02:44ed42e5-747b-eb6c-9273-9cebdd051c64
And here is the error I am still getting from virt-manager :
Traceback (most recent call last):
File "/usr/share/virt-manager/virtManager/createpool.py", line 309, in _async_pool_create
poolobj = self._pool.install(create=True, meter=meter, build=build)
File "/usr/lib/python2.4/site-packages/virtinst/Storage.py", line 353, in install
raise RuntimeError(_("Could not define storage pool: %s" % str(e)))
RuntimeError: Could not define storage pool: cannot send data: Broken pipe
