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From: nather@utastro.UUCP (Ed Nather)
Newsgroups: net.micro.amiga
Subject: Re: Re:  SSDD disk = DSDD disk !
Message-ID: <81@utastro.UUCP>
Date: Tue, 19-Nov-85 09:29:22 EST
Article-I.D.: utastro.81
Posted: Tue Nov 19 09:29:22 1985
Date-Received: Thu, 21-Nov-85 06:56:11 EST
References: <394@caip.UUCP> <39700004@ISM780B.UUCP>
Organization: U. Texas, Astronomy, Austin, TX
Lines: 20

> I have heard that at least some disk do not have a seperate process for
> making SS and DS disks.  That is, all disks are made DS.  Those that are
> bad on both sides are rejected.  Those that are bad on one side become SS.
> And the rest are sold as DS.

My experience, and what I have heard, are otherwise.  I regularly buy
single-sided 5-1/4" floppies and use both sides.  I have yet to have one
fail, unless it failed to format in the first place -- so rare I don't
remember the last time it happened.

Apparently at least one side must pass inspection to be sold as SS but can
(and usually does) pass the DS test -- if it is even run on them.  Since it
costs $$ to test them, I suspect the SS test just tests one side only; if the
other side is also good, fine, but don't spend $$ to find out.

-- 
Ed Nather
Astronomy Dept, U of Texas @ Austin
{allegra,ihnp4}!{noao,ut-sally}!utastro!nather
nather@astro.UTEXAS.EDU