Date: Wed, 12 Jun 1996 07:01:36 -0400 (EDT) From: rhh@ct.picker.com (Randall Hopper) To: dwhite@resnet.uoregon.edu Cc: steve@server.gslink.com, questions@FreeBSD.org Subject: Re: Boot Up Message-ID: <199606121101.HAA15118@elmer.picker.com> 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
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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
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