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From: rhh@ct.picker.com (Randall Hopper)
Message-Id: <199606121101.HAA15118@elmer.picker.com>
Subject: Re: Boot Up
To: dwhite@resnet.uoregon.edu
Date: Wed, 12 Jun 1996 07:01:36 -0400 (EDT)
Cc: steve@server.gslink.com, questions@FreeBSD.org
In-Reply-To: <Pine.BSF.3.91.960611175344.6112C-100000@riley-net170-164.uoregon.edu> from "Doug White" at Jun 11, 96 05:57:11 pm
Reply-To: rhh@ct.picker.com
Organization:  Picker International, CT Division
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Doug White:
 >On Tue, 11 Jun 1996, Steve Schwartz wrote:
 >> Warning, CMOS geometry for C: is mapped, too many heads
 >> Mapped Geometry: 63 sectors 64 heads 787 cylinders
 >> Drive geometry: 63 sectors 16 heads 3148 cylinders
 >
 >The boot floppy can deal with this.
 >
 >> I have on my C: a 1.6 Western Digital with 3 partitions.  A 900MB (Win95) 
 >> 250(Empty for Unix/Linux) and 350(NT4.0)
 >
 >Any way you roll it you are going to end up with an unbootable 
 >partition.  All bootable partitions must be completely below 500MB or so.

Just to qualify this.  Per a recent clarification on hackers, the key
limitation seems to be <= 1024 cylinders, not 512MB.  Without LBA in
effect, 1024 cyl typically equates to 512MB.  With LBA, the MB mark is much
greater since the cylinders are remapped.

BTW, I have my entire FreeBSD 2.1.0 bootable partition (root, swap, and
usr) up past the 700MB mark on my IDE drive -- works great.  The actual
cylinder numbers are > 1024, but the LBA remapped cylinder numbers are
373-786 (< 1024).


                                                  Randall Hopper
                                                  rhh@ct.picker.com