Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!seismo!rutgers!clyde!cbatt!ihnp4!alberta!calgary!candym 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"?