Tandy 1000 MS-DOS Reference Manual page 350

Appendix B / Configuring Thur System
IF:n specifies the form factor index. n can be:
o
=
320/360K floppy
1
=
1.2 M floppy
2
=
720K floppy (3lf2-inch drive)
3
=
8-inch single-density floppy
4
=
8-inch double-density floppy
5
=
hard disk
6
=
tape drive
7
=
other
If you omit IF, DRIVPARM uses a default of 2 (720K).
IH:n specifies the maximum head number. n is a value in the
range 1 to 99.
IN tells MS-DOS that the device is non-removable.
IS:n specifies the number of sectors per track. n is a value in the
range
1
to 99.
IT:n specifies the number of tracks per side. n is a value in the
range 1 to 999.
Example:
You might have a computer with an internal tape drive unit on
Drive D that is configured at boot time 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 CONFIG.SYS file:
drivparm=/d:3 /f:6 /h:1 /5:99 /t:10
This overrides the default device driver settings, and supports a
tape drive as Drive D. (In this case, the logical and physical
drive numbers are identical.) This tape drive has one head, and
supports a format of 10 tracks and 99 sectors per track (assum-
ing that the device driver for the tape drive also supports this
configuration). You might want to use this method to create a
tape that you can read on another computer that reads only this
format.
DRIVPARM=/D:1 /F:2
or
DRIVPARM=/D:1
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