I am not able to read any geometry data off of an old Quantum LPS 52S drive. It has a nice, healthy (but now too loud) spin to it, and there are no signs of trouble on the PCB. I have attached it to three different SCSI boards all with the same results. Resistor packs are in place and doing their job.
I thinking it is some failure of the circuit board and not a mechanical issue in this case.