Path: utzoo!utgpu!watserv1!watmath!att!rutgers!apple!usc!cs.utexas.edu!uunet!motcid!park
From: park@motcid.UUCP (Kyuhwa Gideon Park)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: 3.5" drive in a PC?
Message-ID: <4433@ash28.UUCP>
Date: 17 Oct 90 20:20:01 GMT
References: <40931@eerie.acsu.Buffalo.EDU>
Organization: Motorola Inc., Cellular Infrastructure Div., Arlington Heights, IL
Lines: 26

trljim@ubvmsa.cc.buffalo.edu (James Sonnenmeier) writes:

>I wonder if anyone can answer a question.  I have a 720K 3.5" drive I want
>to install in an origional PC. It had two 5.25" drives so I simply replaced
>one with the 3.5" drive ( I assumed then the mother board switches were set
>already for 2 drives etc ... ) but the machine thinks the 720K drive is
>still a 360K drive! ... Like I said this is an origional PC ( circa 1983)
>if I replace the disk controller with a more modern piece will that let me
>use the drive as 720K??  ( It can *read* a 720K disk but cannot format a
>new disk ... that is it thinks its 360K)

I just did the same upgrade(?) as you have done.  The solution I found is
to use DOS 3.2 or 3.3 and place "drivparm" line (with the right parameter
values) in your config.sys file.  Obviously, this is assuming that the 3.5"
drive is your B: drive.  I am able to format 3.5" diskettes to 720KB.

>Anyone have any ideas??  Thanks

See above.  No problem.

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