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From: "Rashid Karimov." <rashid@haven.ios.com>
Message-Id: <199506152004.QAA27483@haven.ios.com>
Subject: Re: HD Geometry dirty trick
To: rgrimes@gndrsh.aac.dev.com (Rodney W. Grimes)
Date: Thu, 15 Jun 1995 16:04:09 -0400 (EDT)
Cc: hackers@freebsd.org
In-Reply-To: <199506151826.LAA03037@gndrsh.aac.dev.com> from "Rodney W. Grimes" at Jun 15, 95 11:26:03 am
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		Hi there,

> > 	I've found that using "basic" geometry of 1023/64/32
> > 	for SCSI HD with  1Gb capacity and just adjusting the first
> > 	value for other capacities , one can get painless install .
> > 	Foe example , if you install 4Gb HDD - we multiply 1023 by 4
> > 	and use 4092/64/32 Geometry.
> > 	For 300Mb SCSI disk we use (Int(1023/3.3))/64/32 and so on.
> 
> Fine for Adaptec controllers, not so fine for NCR controllers that
> like to tranlate >1G drives to xxxx/62/34, yes that is right 62/34!

	Didn't have any expirience with NCR , but Adaptec 2940
	and Bustec 946c work fine .


	Rashid