Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!utgpu!water!watmath!clyde!rutgers!seismo!lll-lcc!lll-crg!hoptoad!farren
From: farren@hoptoad.UUCP
Newsgroups: comp.sys.ibm.pc
Subject: Re: Diff between 720K, 1.2M floppies?
Message-ID: <2081@hoptoad.uucp>
Date: Fri, 1-May-87 03:01:32 EDT
Article-I.D.: hoptoad.2081
Posted: Fri May  1 03:01:32 1987
Date-Received: Sat, 2-May-87 03:46:29 EDT
References: <1597@ihuxm.ATT.COM>
Reply-To: farren@hoptoad.UUCP (Mike Farren)
Organization: Nebula Consultants in San Francisco
Lines: 21

In article <1597@ihuxm.ATT.COM> edw@ihuxm.ATT.COM (Ed Windes) writes:
>I have a Teac FD-55FV-13-U,  5-1/4", 96tpi floppy drive.
>I am using it in a PC clone as a 720K drive.
>
>What is the difference between this drive and an 1.2M AT drive?
>The pidgin English document included with my drive covers the
>55BV drive (360K) and the 55GFV drive (1.2M) - but doesn't mention
>my drive.  Can I select between the two formats with a jumper?
>

The 55GFV is a 96 tpi drive, but uses special heads and media to
achieve the 1.2M capacity.  I think they also rotate at a different
speed for 1.2M, but am not sure.  You cannot select between the two
formats on the 55FV, although a 55GV can read 720K formats as well as
1.2M.  In general, higher capacity drives can read lower capacity
formats, and not vice versa.
-- 
----------------
                 "... if the church put in half the time on covetousness
Mike Farren      that it does on lust, this would be a better world ..."
hoptoad!farren       Garrison Keillor, "Lake Wobegon Days"