Path: utzoo!news-server.csri.toronto.edu!cs.utexas.edu!uunet!mcsun!corton!chorus!opera.chorus.fr!mir From: mir@opera.chorus.fr (Adam Mirowski) Newsgroups: comp.sys.ibm.pc.hardware Subject: Re: 360K in 1.2M drives Message-ID: <8102@chorus.fr> Date: 5 Mar 91 12:20:00 GMT References: <1991Mar1.155859.16874@cbnewsc.att.com> <20713@shlump.nac.dec.com> Sender: mir@chorus.fr Reply-To: mir@opera.chorus.fr (Adam Mirowski) Organization: Chorus systemes, Saint Quentin en Yvelines, France Lines: 14 In article <20713@shlump.nac.dec.com>, gettys@yacht.enet.dec.com (Bob Gettys) writes: %% %% As for the 3.5 inch ones - the head is the same size on both. The %% tracks are just closer together on the 1.44meg than on the 720k. Thus %% the 1.44meg can read and write the correct sized track in the right %% place for a 720k floppy. I think that every IBM/Atari/MSX 3.5 inch drive uses 80 tracks. With one- side-9 sectors you get 360 Kb, with 2 sides-9 sectors you obtain 720Kb and 1.44 Mb diskettes have 18 sectors per track. I don't know about 2.88 Mb drives. -- Adam Mirowski, mir@chorus.fr (FRANCE), tel. +33 (1) 30-64-82-00 or 74 Chorus systemes, 6, av.Gustave Eiffel, 78182 Saint-Quentin-en-Yvelines CEDEX