Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site ccice5.UUCP Path: utzoo!watmath!clyde!burl!ulysses!gamma!epsilon!zeta!sabre!bellcore!decvax!genrad!mit-eddie!think!harvard!seismo!rochester!ritcv!ccice5!jjg From: jjg@ccice5.UUCP (John Grana) Newsgroups: net.micro Subject: Re: confused about disk drive specifications Message-ID: <868@ccice5.UUCP> Date: Mon, 15-Jul-85 19:44:18 EDT Article-I.D.: ccice5.868 Posted: Mon Jul 15 19:44:18 1985 Date-Received: Thu, 18-Jul-85 07:39:35 EDT References: <11527@brl-tgr.ARPA> Organization: CCI Central Engineering, Rochester, NY Lines: 15 > > Disks have to be approached differently from tapes, because a tape can be made > to move the media at a fixed rate. A disk changes the rate each time you go to > a different track. Your controller > isn't really writing Bits Per Inch--it's writing Bits Per Second. I'm sure > some creative engineering could get around that, but I'm not aware of any. > (I have heard rumors that some disk systems vary the timing based on the track > number so they can get more data on the outside tracks--can anybody verify > this?) The IWM (Integrated Woz Machine) in the Mac uses the above to get more sectors on the outer tracks... !rochester!ccice5!jjg