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Article #13763Disk recording format
From: Ken Bates DTN 522-2039
Date: Wed, 10 Dec 1986 02:51
Date: Wed, 10 Dec 1986 02:51
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Does anyone know what the recording technology is for the 3 1/2" drives? i.e.,
how are the ones and zeros actually encoded on the disk surface from the
standpoint of magnetic flux transitions (NRZI, Manchester, etc.). Although it
may seem like a relatively silly question, I'm writing a program which wants
to test the media surface for various reasons, and a comprehensive test must
of necessity be based on the recording technology used. My local Apple service
tech didn't know what I was talking about, let alone the answer to the
question, so any help would be appreciated. Larry?
- Ken Bates
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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: arc1-ca.pugleaf.net!utzoo!mnetor!seismo!lll-crg!ames!ucbcad!ucbvax!decvax!decwrl!ssdevo.dec.com!bates From: bates@ssdevo.dec.com (Ken Bates DTN 522-2039) Newsgroups: comp.sys.mac Subject: Disk recording format Message-ID: <6848@decwrl.DEC.COM> Date: Tue, 9-Dec-86 21:51:47 EST Article-I.D.: decwrl.6848 Posted: Tue Dec 9 21:51:47 1986 Date-Received: Wed, 10-Dec-86 11:00:09 EST Sender: daemon@decwrl.DEC.COM Organization: Digital Equipment Corporation Lines: 13