Here's what I have done:
- connected a SATA drive (IDE drives are buried in a drawer and hard to find), RAID plugged it: same error
- SATA drive and removed the RAM sticks not marked IBM, RAID plugged in: same error
- SATA drive and removed the RAM sticks not marked IBM, RAID *not* plugged in: the installer gets a little bit further but I get the error message "found a drive greater than 8GB" and some other errors, see attachment.
I've already updated the firmware to the latest version so I guess the 8GB limitation is related to OS/2, what should I try now? The chance of finding a 8GB drive are slim and using a USB drive on a USB 1.1 port doesn't look promising...