🚀 go-pugleaf

I have a minisport ZL-1H notebook computer and a ZA-180-90 external
3 1/2" disk drive. I am running DOS 3.3+. Here is my problem:
The documentation with the disk drive says it can be used as either
a 1.44m or 720k drive. When I configure it as a 720k drive with the
device=c:\driver.sys /f:2 /d:0 command in my config.sys, it works fine
as a 720k drive. But when I configure it as a 1.44 (f:7) I get a general
read error on the drive if i try to do a DIR of a highdensity disk (or
if i try anything else for that matter). Is there a different code I
should be using? do I have to set some other parameters? I have no
documentation for the computer so I am pretty much in the dark.
Any help would be appreciated.

Also, anyone know where I can get a manual for one of these beasts?

Ron McCarty