First, I can't get an answer from the main bricks serial port. I do get to the L1 on the brick with the graphics cards. config shows both bricks:
Are you using the serial port or the USB connector? I would see if you can get into the L1 from the working brick. If you can, there is an option in there for setting the L1 communications behavior (options are something like AUTO, SERIAL, USB, etc.) Unfortunately I can't remember for the life of me what the command is but I know this setting can be a PITA if set incorrectly and you're trying to use the USB port.
first, when it boots up it says:
ALERT: VRM not OK: type CPU C 12V, number 2
however it seems to work.
VRM Type Location Present Okay
-------------- -------- ------- -------
CPU A 12V 1 passed passed
CPU C 12V 2 passed FAILED
NODE 2.5V on board passed passed
NODE CPU A on board passed passed
NODE CPU C on board passed passed
That's going to be the power pod on the CPU, which is a bummer. However, there is a slim chance a reseat will clear things up. The power pod utilizes an edge connector on the IA CPU board - maybe it's just loose, or better yet maybe the cable is disconnected
It's been awhile since I've replaced one, but I think you can remove the 2 (or 4..I forget) screws from the pod and slide it back away from the CPU. Otherwise just uncam the CPU, remove all the screws and pull the whole works out.
If that doesn't work, start looking for a new power pod (probably easier to find a CPU w/power pod) or just disable the CPU from the L1 and ignore the warning.
when it boots up it disables 4GB of memory:
EFI Boot Manager ver 1.10 [14.62]
Partition 0: Enabled Disabled
CBricks 2 Nodes 4 0
RBricks 0 CPUs 4 0
IOBricks 2 Mem(GB) 8 4
How can I find out why it's disabled?
As previously suggested, reseat the memory. What's the memory config? 4GB in each brick? If so and the disabled 4GB is all in one brick something is fishy. Remember the memory is in banks, so one bad DIMM and you'll drop the whole bank.
I also can't get an output on the serial port of the main brick with the I/O board. Is this normal behavior?
I can only access the L1 on the brick with the graphics cards.
Not normal behavior, but as I mentioned earlier I believe there is an L1 option that can cause some grief. I'll try to dig that info up and post it later.
Is it true that disk drives can only be used when a PCI I/O module is installed?
In that case, I wonder why this Prism has four disks installed.
Correct, the SCSI (IO9) or SATA (IO10) controller is located on the IO9 or IO10 respectivly. No IO, no drives. 4 drives in a two brick/dual pipe config would be odd, not to mention impossible with the graphics options that take two PCI slots. The reason it would be odd in a two brick/two pipe config is that the IO9/10 runs at 66MHz, so PCI bus 0 will be limited to 66MHz, thus slowing down the graphics card on bus 0 (wait, now my memory is failing...did the ATI graphics options run at 66 or 133?). Regardless, this was not a standard config and
I don't have a proper monitor at hand right now. If possible I would like to install the original SuSE Linux on the system. Does anybody know if it can be installed with serial console, but still later use the graphics?
Yes, in fact you have to install via console because the graphics won't be initialized until you install Pro Pack on it.