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From: candym@calgary.UUCP (Mike Candy)
Newsgroups: comp.sys.amiga
Subject: Re: Great big huge floppy disk?
Message-ID: <736@vaxb.calgary.UUCP>
Date: Sun, 21-Dec-86 19:27:49 EST
Article-I.D.: vaxb.736
Posted: Sun Dec 21 19:27:49 1986
Date-Received: Mon, 22-Dec-86 18:44:06 EST
References: <346@csustan.UUCP>
Organization: U. of Calgary, Calgary, Ab.
Lines: 22
Summary: Sorry won't work

In article <346@csustan.UUCP>, smdev@csustan.UUCP (Scott Hazen Mueller) writes:
> I'd like to throw out to the net an idea I had last night:
> 
>    Is it possible to hook an PClone hard drive to the Amiga external
> drive port?  To my mind, all it would take is one drive w/controller
> (~300-400$), a box with a power supply ($100?) and a custom cable to
> go from the card-edge connector on the controller to the Amiga port.
> 
>                             \scott

A nice idea but it won't work. If you could rig a cable to get from your
hard drive to the floppy expansion port, the ultimate problem is the 
rotational speed of the hard drive. A floppy rotates at 300 RPM giving
the controller 200 msec to write 11 sectors of data. The hard drive 
rotates at 3600 RPM or 16.7 msec per revolution, this means the maximum
number of sectors on a track would be 11 / (200 / 16.7) = .91 !!
Hard disk controllers write raw data at a much faster rate, and I know
of no way to get the Amiga to write data faster.

Does anybody know what controller chip the Amiga uses? If it is an FDC765A
or equivalent, has anybody tried an FDC7265 which is supposed to get 20%
more storage and be "completely software- and pin-compatible"?