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From: rhaar@albert.cs.gmr.com (Robert L. Haar CS50)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: Do ANY hardware hacks read this group??!!
Keywords: hardware hacks
Message-ID: <45196@rphroy.UUCP>
Date: 15 Feb 91 19:55:37 GMT
References: <1991Feb15.183139.1285@coplex.uucp>
Sender: news@rphroy.UUCP
Reply-To: rhaar@albert.cs.gmr.com (Robert L. Haar CS50)
Lines: 24

In article <1991Feb15.183139.1285@coplex.uucp>, dannie@coplex.uucp
(Dannie Gregoire) writes:
|> ....  I would assume by the name
|> of this group that there are at least a few hardware hacks out there.
|> If so, PLEASE answer me this.....
|> 
I don't think of myself as a hardware hacker in the IBM-PC world
but I have some information.

|> 	What are the hardware differences between 760K and 1.44M 3.5"
|> floppy drives???  The limited information that I have tells me that there
|> is no difference, but some experimentation tells me otherwise.  
|> 
There are differences, but you might not see them. Both 720K and 1.44M
3.5 diskettes use a very similar layout - same number of tracks,etc.
The difference is in the density that data is stored on the disk.
This results in the 1.44M drives having data transfer signal rates
twice that of the 720K drives. That is why you cannot put a 1.44M
drive on a 720K controller and expect it to work.

	Bob Haar  InterNet : rhaar@albert.cs.gmr.com 
	Computer Science Dept., G.M. Research Laboratories
DISCLAIMER: Unless indicated otherwise, everything in this note is
personal opinion, not an official statement of General Motors Corp.