If I go part way through the installation procedure with Yast it offers to partition the first hard drive and makes no mention of the second. Possibly it does see it in some sense - am not sure.
Your computer contains the ECS 915P-M3 motherboard. The ECS 915P-M3 mainboard is based on Intel® 915P and Intel® ICH6 chipset for optimal system efficiency. Designed to fit the advanced Intel® Pentium Prescott LGA775 processor.
The BIOS is American Megatrends v02.58.
The PC already had a SATA-1 hard drive. Am adding a second, which is SATA-2.
So far as I know the new one is unformatted. At any rate, it's just out of the box: a Samsung Spinpoint 250GB.
Windows does see it when I change the BIOS setting to 'SATA only' (advanced set-up/IDE configuration) - but then I lose the ability to boot from the optical drive. So am stuck!