From: "William Levak"; on Sat., October 22, 2011; at 01:11 AM -0400 > > On Fri, 21 Oct 2011, Ed Johnson wrote: > > > I have a SFD 1001 and it used DS/DD diskettes, NOT HD (High Density) > > diskettes. > > The drive mechanism on the SFD 1001 is a Quad Density drive, > compatible with DD, but not HD. "Quad" was a marketting gimmick. It wasn't related to single- and double-density. It meant that the track density, not the bit density, was "doubled". The 4040 format is 48 Tracks Per Inch, while the 8050 format is 100 TPI. Message was sent through the cbm-hackers mailing listReceived on 2011-10-22 11:00:04
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