I was quite sure I were not the only one had problems with these crappy iScsi Fujitsu SANs.
I had another customer with similar problems with SX80 iSCSI (two CM fault in one time !!).
BTW, my customer decided to buy another SAN and I was able to make one CM partially working and transfer all the stuff.
There is not a step by step path, but I could see changing some parameters on iscsi interface (and revert back to original, only to do some kind of saving to memory) and reboot CMs from web interface
made one CM working until next reboot when it fails again.
Sometimes I had to do this twice
I think there is no chance to make it working again but at least I was able to recover Virtual machines quickly