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From: farren@gethen.UUCP (Michael J. Farren)
Newsgroups: comp.sys.amiga
Subject: Re: hard disk flaw problems
Message-ID: <397@gethen.UUCP>
Date: Sat, 28-Nov-87 17:06:28 EST
Article-I.D.: gethen.397
Posted: Sat Nov 28 17:06:28 1987
Date-Received: Tue, 1-Dec-87 06:01:43 EST
References: <1884@cadovax.UUCP> <2605@masscomp.UUCP> <1888@cadovax.UUCP> <310@etn-rad.UUCP>
Reply-To: farren@gethen.UUCP (Michael J. Farren)
Organization: Sci-Fido - Unix in Oakland
Lines: 19
Keywords: hard disk format flaws

In article <310@etn-rad.UUCP> steve@etn-rad.UUCP (Steve Childress) writes:
>Now in the Western Digital (WD) controllers, there can be at most 8
>heads, but the cylinder numbers can extend to 2**16 because there are
>two, 8-bit registers.

I have been lead to believe (through discussions on comp.sys.att), that
there is a new WD controller, for the most part pin-compatible with the
existing chip, which will allow 9 head operation.  Several people have
reported using this to allow their AT&T 7300's, which are normally limited
to 67Meg formatted capacity disks, to fully utilize a 130Meg disk.

It might be an interesting exercise to see if the 2090 could be adapted
to use one of these new chips.

-- 
----------------
Michael J. Farren      "... if the church put in half the time on covetousness
unisoft!gethen!farren   that it does on lust, this would be a better world ..."
gethen!farren@lll-winken.arpa             Garrison Keillor, "Lake Wobegon Days"