http://www.ebay.com/itm/Shugart-model-801-8-Floppy-Drive-/230897115754?pt=US _Floppy_Zip_Jaz_Drives&hash=item35c28a626a if that matters, and that's all I have of an MDS system). The listing calls it a Shugart 801. I seem to recall Fred stating that a S* 800 was a *good* drive to utilize w/some peecee disk controllers.? Is an 801 also *good*? I e-mailed the seller intending to grill some info out of him. Here is a set of pictures picture of the jumpers from my MDS drive with Shugart 801's in it. Do they match up with yours? I don't have the system it came from only the drive. Note how drive 0 jumpers differ from drive 1 significantly. You can see from the pics that the outside of the case was pretty dirty, fortunately cleaned up nicely. The inside was just fine, no grime. I did not look up the jumpers in the manual, just took the pics for future reference. http://vintagecomputer.net/intel/MDS-720/ Bill