The HSG80 controllers were part of the old MA8000 infrastructure that Compaq did long before stuff like the Modular Smart Array (MSA) series made simple SANs affordable.
The G in HSG stands for glass which means that these are, indeed, fibre chanel products you have and certainly are not capable of iSCSI (dont think it had even been thought of when these were around) - even modern SANs dont mix fibre and iSCSI, you have one or the other.
Delving back into teh recesses of my mind tells me that you should be able to talk to the HSG controller directly via a console cable that goes into what looks like an ethernet port but is actually a serial connection (I have a feeling that the wiring on tis was odd and so a normal Cisco type console cable wont work but I may be wrong).
Connection will be done via normal HyperTerminal type connection - form there you can set up the array etc etc - had a quick dig on th enet and cant find a "how to factory reset" document but will likley have one in the office from when we used to sell loads of these, will look when I'm in there.
To be honest though - if you have no fibre switch, HBAs or cables you are going to have to buy all that kit and then go through all this hassle to get working an array that is around 8 years old. For the amount of hassle and cost you'd be as well looking at a modern MSA or similar as you'll get far more performance (the HSG80 is only a 1Gbps controller) and capacity than you have now.
Just my thoughts though - if you want to press on then I'll help if I can!
Andy
