So I just ran the firmware update. But tbh I never saw any really important issues fixed with the IO module in the D2600 themselves. More often there were good issues fixed in the firmware to the P411 controller. My server was running linux.
No it does not have an IP. The MFG is only serial. YOu manage the server with HP ACU or HP SSA. Do you find it in there? You gotta create the arrays and logical drives before the OS can see the disks.