Data Systems Design DSD-880 8" floppy and hard drive?

Anybody know anything about a DSD-880 8" floppy and hard drive unit made by Data Systems Design? (Black rack mount box about 6" high and 28" deep.) I found several of them today. I'm pretty certain that they came off of a system tester or circuit board tester based on a DEC computer. The units had a Shugart 800-1 8" SSDD floppy drive and a Quantum Q2040 8" hard drive in them and a INTERESTING looking front panel that said "Hyper Diagnostics" or something like that. I bought a HUGE lot of 8" floppy disks from the same place. They almost certainly came from the same systems. The disks contained RT-11 and RSX. I found that some of the disks had the driver and diagnostics for the DSD-880. Also found copies of distribution disks for RT-11 and RSX in the same pile. Joe