I recently installed Debian testing on a IBM RS6000 44p-170. I booted from network. With the help of some docs on the web this worked well.
The problem: debian-installer failed to make the system bootable from harddisk. The solution is simple: create a small (I used 7 MB) partition with type 0x41 (something like IBM PreP boot partition) and 'dd' the kernel zImage directly to the partition (make sure to set the root partition in the kernel). I haven't tried yaboot yet and probably won't in the next future as the system now boots which is all I want. I can provide more information about the system in a few days if needed to fix debian-installer (somebody from the d-i team on this list?). Rainer
