Large ESDI Disks

From: jeff.kaneko_at_juno.com <(jeff.kaneko_at_juno.com)>
Date: Sat Feb 2 13:52:46 2002

On Fri, 1 Feb 2002 21:24:22 +0000 jpero_at_sympatico.ca writes:
> The biggest ESDI HD I have currently; 1.3GB and second biggest is
> 800MB (working w/ ultrastor U24F. Problem is with that Micropolis
> 1.3GB ESDI I couldn't get it LLF'ed w/ Ultrastor U24F, I think
> something is not set right despite that card supports 2048 cyls.
> Help?

This is the single biggest problem (that I've seen) with ESDI
drives over 800MB: These suckers run with a 24MHz data rate.
There are only two ISA controllers (that I know of) that can
handle these: The WD-1009, and the Ultrastor 12F-24.

I purchased a WD-1009 over the holidays, but haven't had the
opportunity to test it. There are two versions of the WD-1009:
One with a BIOS and one without. The ones without are utterly
*worthless* (unless you're using it in a Compaq DeskPro that
supports it).

I don't even want to talk about the 12F-24. These things are
so rare, I've seen maybe one or perhaps two offered on E-Pay
in the past four years.

Q-Bus 24MHz controllers are far more common, but troublesome
to obtain nonetheless.

I was extremely surprised that ESDI's are still being made
(albeit for 'commercial' applications).



Jeff


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Received on Sat Feb 02 2002 - 13:52:46 GMT

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