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To: freebsd-hackers@freefall.FreeBSD.org
Subject: Re IDE/eIDE issues 
In-reply-to: Your message of "Thu, 16 Nov 1995 15:21:00 +0100."
             <199511161421.PAA22771@gilberto.physik.rwth-aachen.de> 
Date: Thu, 16 Nov 1995 17:36:39 +0000
From: Neil Brendan Clark <nbc@vulture.dmem.strath.ac.uk>
Sender: owner-hackers@FreeBSD.ORG
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In message <199511161421.PAA22771@gilberto.physik.rwth-aachen.de>you write:
>
>Looking back I find that I did only do mostly SCSI installations
>in the past and my (successful) IDE  installations date back into
>times where common IDE drives used to have less than 1/2 GB.

In my experience the root partition must not only be reachable by the BIOS,
but be contained entirely within the reachable limits of the BIOS, i.e.
<1024 cylinders or whatever. On my 1GB drive I have a small root which is
used to mount the rest after the BIOS has been blown out; here's the fdisk
info for completeness.

Neil

******* Working on device /dev/rwd0 *******
parameters extracted from in-core disklabel are:
cylinders=2099 heads=16 sectors/track=63 (1008 blks/cyl)

 Figures below won't work with BIOS for partitions not in cyl 1
parameters to be used for BIOS calculations are:
cylinders=2099 heads=16 sectors/track=63 (1008 blks/cyl)

Warning: BIOS sector numbering starts with sector 1
Information from DOS bootblock is:
The data for partition 0 is:
sysid 77,(unknown)
    start 263088, size 676368 (330 Meg), flag 0
	beg: cyl 261/ sector 1/ head 0;
	end: cyl 931/ sector 63/ head 15
The data for partition 1 is:
sysid 165,(FreeBSD/NetBSD/386BSD)
    start 939456, size 42336 (20 Meg), flag 80
	beg: cyl 932/ sector 1/ head 0;
	end: cyl 973/ sector 63/ head 15
The data for partition 2 is:
sysid 165,(FreeBSD/NetBSD/386BSD)
    start 981792, size 1134000 (553 Meg), flag 0
	beg: cyl 974/ sector 1/ head 0;
	end: cyl 1023/ sector 63/ head 15
The data for partition 3 is:
sysid 6,(Primary 'big' DOS (> 32MB))
    start 63, size 263025 (128 Meg), flag 0
	beg: cyl 0/ sector 1/ head 1;
	end: cyl 260/ sector 63/ head 15