On 8/16/22 08:17, Jonathan Chapman via cctalk wrote: >> The last time I checked, bitsavers had information on the 1015, 1016 and >> 1115 floppy drives (I have all three models). Did the VG use something >> different? > > No, but I didn't find the model numbering w.r.t. first chassis vs. expansion > chassis very clear, especially between the older "blue box" drives and newer > "beige box" drives, and the new Micropolis site lays it out plainly with a > table of possible model numbers. The new site was one of the higher results > for one of the expansion chassis model numbers I'd searched.
Ah, I've always gone by the physical drive itself. There were changes early on with the blue-lever Micropolis drives to start the motor when closing the drive latch. It was a real problem back in thee day with the early drives--the spindle motor wouldn't be turning when the disk was seated, which resulted in seating the disk off-center much of the time, mangling the hub. I think it was Dysan that first showed up with reinforcing ring kits to be applied to disks to ameliorate the problem, but ultimately the solution turned out to be making sure that the motor was on during the seating process. That's why, for example, 5.25" DD media usually has hub reinforcement, but HD media rarely does. By the time HD media was a thing, the problem had been solved. --Chuck
