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From: grunwald@foobar.colorado.edu (Dirk Grunwald)
Newsgroups: comp.sys.dec
Subject: Re: HELP!!!! nedded with Fujitsu M2266S drive
Message-ID: <1991Feb27.215527.22800@csn.org>
Date: 27 Feb 91 21:55:27 GMT
References: <sudha.667684203@milton>
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Reply-To: grunwald@foobar.colorado.edu
Organization: University of Colorado at Boulder
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In-Reply-To: sudha@herodotus.cs.uiuc.edu's message of 27 Feb 91 19:50:03 GMT
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in general, here's how to hook a SCSI disk up to an Ultrix machine.

use rzdisk -g current, record the total number of blocks available.

Invoke mathematica, and use FactorInteger ot determine prime factors
of the number of blocks.

Choose a reasonable number of sectors per track from the prime factors.
Choose a reasonable number of heads from the prime factors.

Divide through and get the number of cylinders.

Bingo, you now have a maximal geometry for your drive. Subtract some
cylinders for UNIX, which still thinks it needs to remap things (the
drive actually handles this), throw the information at a SC/VC spreadsheet
and partition away.

The interface to SCSI drives has no concept of 'cylinders', 'tracks'
or 'heads'. Most drives record a variable number of sectors per tracks
anyway. The UNIX utilities have not kept pace with these drives.

Also, don't forget to enable the cache read ahead on the FUJI drives.
It's a noisy drive, but fast.


Dirk Grunwald -- Univ. of Colorado at Boulder	(grunwald@foobar.colorado.edu)
						(grunwald@cs.colorado.edu)