Reply-To: "George Gonzalez"
From: "George Gonzalez"
References: <email@example.com> <3DA6BB87.CBB0AB36@webaccess.net>
Subject: Re: Q. why 5400 and 7200 rpm disk drives?
X-Newsreader: Microsoft Outlook Express 6.00.2600.0000
NNTP-Posting-Date: Fri, 11 Oct 2002 12:42:20 GMT
Organization: AT&T Broadband
Date: Fri, 11 Oct 2002 12:42:20 GMT
Ah yes, the Apple twiggy drives. A great lesson, the moral of which is:
Dont try to do everything yourself.
The Apple factory that made the twiggy and their Lisa hard disks had
like a 60% reject rate at final inspection, goiong down to 40% after the
got custom tweaking. My Lisa hard disk had several colored-circle stickers
probably indications of how many tweaking steps it went thru.
There's a story about Steve Jobs visiting the factory, getting the bad
news, and firing everybody in the place. Probably exaggerated, but IIRC
they did close that operation down pretty darn quick.
The original Mac was destined to use the twiggy drives-- there was even a
small production run with the case molded to accept the large twiggy drives.
They never made it to consumers, all got used for internal prototyping and
I imagine they'd be quite the collectors item today!
You can see remnants of the twiggy design in the original Mac case-- there's
scads of space to the left and right of the floppy drive, space reserved for
the twiggy drive.
Also the Mac power supply has a fair amount of excess +12V amperage
available, as needed by the twiggy.