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From: hes@ecsvax.UUCP (Henry Schaffer)
Newsgroups: net.micro
Subject: Re: confused about disk drive specifications
Message-ID: <1625@ecsvax.UUCP>
Date: Thu, 11-Jul-85 12:19:30 EDT
Article-I.D.: ecsvax.1625
Posted: Thu Jul 11 12:19:30 1985
Date-Received: Sat, 13-Jul-85 14:31:38 EDT
References: <735@abnji.UUCP>
Organization: NC State Univ.
Lines: 6

I have always heard single vx. double density to refer to bits
per track, while quad density was loosly used to mean 98 tpi or
any other method of giving twice the amount of storage available
from double density (double density on a double sided 5 1/4"
is approx 316k - 370k, and so quad means >=600k.)
--henry schaffer