Path: utzoo!utgpu!water!watmath!clyde!att!pacbell!lll-tis!helios.ee.lbl.gov!nosc!ucsd!ucsdhub!esosun!seismo!uunet!uport!plocher
From: plocher@uport.UUCP (John Plocher)
Newsgroups: comp.unix.xenix
Subject: Re: SCO Xenix/386 and large drives
Keywords: large cylinders
Message-ID: <378@uport.UUCP>
Date: 24 Jul 88 00:17:16 GMT
References: <80@iisat.UUCP> <747@applix.UUCP>
Reply-To: @uport.UUCP (John Plocher)
Distribution: na
Organization: Microport Systems, Scotts Valley, CA
Lines: 18

>I remember hearing that > 1024 cyclinders was a problem mainly
>because the SETUP memory location on AT's and compatibles couldn't
>handle a number larger than 1024. Since Xenix 2.2 allows you to

	The WD1002 WA2 controller is physically restricted to 1024 cyls.
	The WD1003 and newer ones are limited to 2048 :-)

>I had a similar problem with Maxtor 1140 drives, which are 917 cylinders,

	But, the 1140 is *really* 1220 cyls, the label (and testing) is
the only difference between it and the 2190.  Try the same formatting
trick for 1024 cyls (or 1220 if your controller can grok it) ... :-)
I did this to 3 of them - they are still alive and kicking !

(Microport's V/386 2.2 and before have a hd driver that is limited to
1024 cyls; version 3.0 (shipping in Sept) handles up to 2048+RLL+ESDI)

	-John Plocher