Path: utzoo!attcan!uunet!steinmetz!davidsen
From: davidsen@steinmetz.ge.com (William E. Davidsen Jr)
Newsgroups: comp.sys.ibm.pc
Subject: Re: More on ST 4096 in PS/2 Model 60
Keywords: hard disk ps2 mfm bios details
Message-ID: <12587@steinmetz.ge.com>
Date: 14 Nov 88 15:36:23 GMT
References: <5286@thorin.cs.unc.edu>
Reply-To: davidsen@crdos1.UUCP (bill davidsen)
Organization: General Electric CRD, Schenectady, NY
Lines: 38

In article <5286@thorin.cs.unc.edu> davis@clocs.cs.unc.edu (Mark Davis) writes:
| 
| In review: I want to put a new hard disk drive in a PS 2 Mod 60.  The
| drive that I would like to use is a Seagate ST4096.  I have learned
| some things perhaps of general interest this week.
| 
| Thanks to a posting by ogilvie@klipper.cs.vu.nl, I was able to list the
| contents of the disk type table from the BIOS ROM.  A 4096 is a type
| 35 drive.  The ROM has types 1 through 32.  (By the way, since I do
| not have MSC 4.0, I translated his program to Turbo Pascal 4.0.)
| Result: This will not be an trivial installation.

  The "type" of a disk is set by the manufacturer, and a 4096 may be
type 18 in someone else's ROM. There's a simple solution... I have a
disk mapper which will allow you to use your disk with no commercial
driver software, if you're willing to live with (a) DOS3.3 or greater,
and (b) using 32MB partitions.

  I wrote it because two of the disk mappers we were using slowed the
disk access severely. Running a program to find the best interleave
showed 3:1 on a stock AT, 5:1 with these products (I don't want to
mention the names for obvious reasons). My little program allows 3:1
access to the disk.

  It does *not* give partitions larger than 32MB, so you are limited to
128MB total disk size. If you want more than one partition you need
DOS3.3 or better.

  How to get it: I will mail it to the original person who asked about
the 4096, and if anyone wants it I'll post to binaries. If you want it
now you can order for $5 from PESS, Box 85, Rexford NY 12148-0085. NYS
residents add tax.

  If I get <5 requests for it I'll just mail it out.
-- 
	bill davidsen		(wedu@ge-crd.arpa)
  {uunet | philabs}!steinmetz!crdos1!davidsen
"Stupidity, like virtue, is its own reward" -me