From owner-freebsd-hackers Fri Jan 6 10:55:15 1995 Return-Path: hackers-owner Received: (from root@localhost) by freefall.cdrom.com (8.6.9/8.6.6) id KAA25789 for hackers-outgoing; Fri, 6 Jan 1995 10:55:15 -0800 Received: from cs.weber.edu (cs.weber.edu [137.190.16.16]) by freefall.cdrom.com (8.6.9/8.6.6) with SMTP id KAA25783 for ; Fri, 6 Jan 1995 10:55:14 -0800 Received: by cs.weber.edu (4.1/SMI-4.1.1) id AA20156; Fri, 6 Jan 95 11:48:48 MST From: terry@cs.weber.edu (Terry Lambert) Message-Id: <9501061848.AA20156@cs.weber.edu> Subject: Re: 32 heads for enhanced IDE!? To: gvrooij@mmra1.ms.philips.nl (Guido van Rooij) Date: Fri, 6 Jan 95 11:48:47 MST Cc: freebsd-hackers@freefall.cdrom.com, gvrooij@muxgw1.ms.philips.nl In-Reply-To: <9501061222.AA26078@mmra1.ms.philips.nl> from "Guido van Rooij" at Jan 6, 95 01:22:46 pm X-Mailer: ELM [version 2.4dev PL52] Sender: hackers-owner@FreeBSD.org Precedence: bulk > 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). Typically Enhanced IDE operates by stealing a bit from one quantity to give to the other. The BIOS quantity *is* the translated view, taking this into account. There is a nice long Byte article on the whole thing. Terry Lambert terry@cs.weber.edu --- Any opinions in this posting are my own and not those of my present or previous employers.