From: Chuck Simmons
Organization: You jest.
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Subject: Re: Q. why 5400 and 7200 rpm disk drives?
References: <email@example.com> <3DA6BB87.CBB0AB36@webaccess.net>
Date: Fri, 11 Oct 2002 13:32:06 GMT
NNTP-Posting-Date: Fri, 11 Oct 2002 06:32:06 PDT
George Gonzalez wrote:
> Ah yes, the Apple twiggy drives. A great lesson, the moral of which is:
> Dont try to do everything yourself.
At the time, the most successful business model was the vertical
integration model. Certainly, the leaders, IBM and DEC, were very much
vertically integrated. The top players in disks back then were probably
IBM, DEC, CDC, STC and Fujitsu. The latter two would sell OEM but the
others sold into captive markets. Apple simply tried to move into the
gap between what was available in small drives and what was possible in
small drives. However, they misjudged the learning curve which is still
several years. The reason Apple interviewed me in 1982 was that they
were looking for technology that the big players had that small drives
of the day did not have. I could not have been of use to them in the
stepper drive era of small drives. I knew nothing about stepper drives
because I got into drives at DEC. In the end, I did not go to Apple but
I strongly considered it given the vision they seemed to have of the
> Also the Mac power supply has a fair amount of excess +12V amperage
> available, as needed by the twiggy.
Yep, CLV is a horrible power hog.
... The times have been,
That, when the brains were out,
the man would die. ... Macbeth
Chuck Simmons firstname.lastname@example.org