Path: utzoo!attcan!uunet!wuarchive!usc!srhqla!demott!kdq
From: kdq@demott.COM (Kevin D. Quitt)
Newsgroups: comp.binaries.ibm.pc.d
Subject: Re: Disk space for FREE (was Re: super high density formatters)
Message-ID: <992@demott.COM>
Date: 19 Nov 90 15:59:50 GMT
References: <1990Nov18.100239.10040@corp.telecom.co.nz>
Reply-To: kdq@demott.COM (Kevin D. Quitt)
Organization: DeMott Electronics Co., Van Nuys CA
Lines: 25

In article <1990Nov18.100239.10040@corp.telecom.co.nz> stephen@corp.telecom.co.nz (Richard Stephen) writes:
>I think the "no difference in the media" statement could be debated a
>while. In principle, I'm inclinded to agree if you view it from a disc
>manufacturer's point of view. It would be horribly expensive to run two
>production lines, but if you run one production and test *every* disc as
>it comes off the line with a special rigorous test for 1.44 MB media
>integrity, you have "guaranteed" 1.44 MB discs and the failures are, after
>quality checks your 720 K discs. Sound reasonable ?

    Most manufacturers run a single line.  Disks are tested for either
high or low density; disks that fail high-density certification are
usually tossed, rather than sent back for low-density certification (not
cost-effective).  Manufacturers that maintain good quality standards
will have very few dropouts of either type, and usually not
significantly more on the high side than on the low (when something's
wrong in a newly manufactured disk, it probably isn't subtle). 


-- 
 _
Kevin D. Quitt         demott!kdq   kdq@demott.com
DeMott Electronics Co. 14707 Keswick St.   Van Nuys, CA 91405-1266
VOICE (818) 988-4975   FAX (818) 997-1190  MODEM (818) 997-4496 PEP last

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