Thanks for the information...
I tried putting one large, empty FAT32 partition on each of the disks and booting, but that doesn't seem to work either. Are you sure FAT32 is correct? The console complains about ext2 file systems
Loading from block device ide device 0, partition 1: Name: hda1
Type: U-Boot File:/initrd.buffalo
Failed to mount ext2 fil*s* Bad ext2 partition or disk - ide 0:1 **
Using device ide1, partition 1
Loading from block device ide device 1, partition 1: Name: hdb1
Type: U-Boot File:/initrd.buffalo
Failed to mount ext2 filesystem...
** Bad ext2 partition or disk - ide 1:1 **
Lost all init_rd
I am quite sure that the warranty on this one is voided, but I also have a couple of onmodified ones, and I'm still a bit confused about the Pro Duo's behaviour - shouldn't it fall back to TFTP boot when the hard drives are unbootable?