Comment 4 for bug 575240

It's also worth noting that as is iscsid in new Ubuntus (Natty has it, probably others past Jaunty as well) will fail and disconnect targets when it's invoked on an iscsi root because of a kernel change (it treats "(null)" as real credentials, rather then indicating no credentials and will fail out of discovery sessions and node logins ).

To fix this I had to build open-iscsi against the newer 2.0.872 version. A straight rebuild with the new sources and the Ubuntu debian folder worked fine. It's a 3 line patch to fix the issue, and the new version should probably be rolled out as an upgrade since without using an ISCSI root is badly broken.