More details. It has been working for many years. Just recently, the server starts having the problem. No major hardware and software changed except windows update.

In the iSCSI Discovery, we have this settings.



in EqualLogic SAN, we allow all 4 connections. 



Whenever we add 2 more sessions in Volume Properties, they stay there for a few seconds and then disappear. SAN also show the new sessions for a few seconds and then disappear.



What could be the problem?



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