Commodore PC Ms-Dos 3.2 User's Manual page 324

252 MS-DOS User's Reference
Example:
Reconfiguring a Suppose your computer has an internal tape drive on drive D that
tape drive is configured at startup to write 20 tracks of 40 sectors per track.
If you want to reconfigure this tape drive to write 10 tracks of 99
sectors each, you can put the following line in your configsys file:
drivparm=/d:3 /f:6 /h:1 /s:99 /1:1 0
This command line overrides the default device driver settings,
and supports a tape drive as drive D (in this case the logical and t J
physical drive numbers are identical). This tape drive has 1 head ^^^
and supports a tape format of 10 tracks and 99 sectors per track.
(This assumes that the device driver for the tape device supports
this configuration of tracks and sectors.) So, to create a tape that
you can read on another computer, one which can read only this
alternate format, you might want to use this method.
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