Put 1.7MB onto 1.44MB Floppies (1999)

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Microsoftt’s DMF 1680K Floppies

Microsoft uses this format only for distribution of its own software, and it is essentially undocumented (a search of Microsoft’s developer database elicits only the information that “DMF … is a special read-only format for 3.5-inch floppy disks that permits storage of 1.7 MB of data”). In order to get 82 tracks of data onto the diskette, the 1720K MDF format makes your head move closer to the center of the floppy media. So, to format a blank disk in DMF format, and create an MSDOS file system on it, you could use the following commands: The DD command to create a floppy from the image file would be: I wanted to add a caching name server, BIND, to the original gateway software, but there was no way I could make available the extra 160K of floppy space needded for that executable.

Source: www.trevormarshall.com