exp plus storage device

Anyone know of any issues using one of the exp plus storage devices through a raid controller not attached to an RS/6000 ? I have had 0 luck getting a kernel to tftp boot on my rs6000 box and I want to at least use the exp plus storage. I have connected it to a raid controller on another pc and

RS/6000 43p Model 260

I'm trying to get this RS/6000 (see subject) to install debian powerpc linux. I have gotten the bootp / tftp system setup but I have not been able to locate a bootable kernel image to continue the installation. Anyone know which image I should use or had any luck on this type of system? Mark