After installing the MS-DOS 5 Upgrade on a Tandy 1000HX, 1000TX, or
1400LX computer, the computer attempts to format a 3.5-inch disk as a
Using other size parameters results in the following error message:
Invalid Parameter, This Mode Not Supported, Formatting 360K
According to Tandy Corp., this problem can be worked around by using
the /I switch with a DRIVPARM statement in the CONFIG.SYS file. Using
DRIVER.SYS or DRIVPARM alone will not eliminate the problem.
The following statement should be placed in the CONFIG.SYS file:
drivparm=/d:[drive number] /f:[size of drive] /i
The /I switch indicates an electronically compatible disk drive.
The Tandy products included here are manufactured by a vendor
independent of Microsoft; we make no warranty, implied or otherwise,
regarding these products' performance or reliability.