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From: gvrooij@mmra1.ms.philips.nl (Guido van Rooij)
Message-Id: <9501061222.AA26078@mmra1.ms.philips.nl>
Subject: 32 heads for enhanced IDE!?
To: freebsd-hackers@freefall.cdrom.com
Date: Fri, 6 Jan 1995 13:22:46 +0100 (MET)
Cc: gvrooij@muxgw1.ms.philips.nl (Guido van Rooij)
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I am trying to help out a friend here that has problems installing 2.0R on
an enhanced IDE drive. I hope to find an answer as his company wants to
start using FreeBSD. I am afraid they will go on with Linux otherwise.

In his BIOS setup, he entered 1048 cylinders, 16 heads and 63 sectors/track

IDE_CONF reports:
		Cyl	Hds	S/T
Bios reports	524	32	63
Controller	1048	16	63 before reset
,,		,,	,,	,, after reset

The strange thing is the fact that the Bios reports something that is different
from its own setup!? The bios is an AMI one (on a P90 board).

The settings now behave like:
						Cyl	Hds	S/T
After Msdos fdisk/mbr, FreeBSS reports:		1028	16	63
After making a 50Meg Dos partition with
	fdisk, FreeBSD reports:			524	32	63
(plus a notice it cant handle 32 heads).

So I just dont know what settings to use. I'd say 524/32/63 but that's
explicitly forbidden. I hacked a new wd.c that allows it, but that 
hasnt been tested yet. (btw: what happened to the ATA docs in /sys/i386/doc?)

Any other options?

-Guido