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Date:      Mon, 25 Jan 1999 18:39:01 -0500
From:      "Donald J . Maddox" <dmaddox@conterra.com>
To:        Mike Smith <mike@smith.net.au>
Cc:        dmaddox@conterra.com, "Daniel C. Sobral" <dcs@newsguy.com>, Tom Torrance <freebsd@tomqnx.com>, hackers@FreeBSD.ORG
Subject:   Re: RELENG_3 boot panic
Message-ID:  <19990125183901.A1404@dmaddox.conterra.com>
In-Reply-To: <199901252324.PAA12570@dingo.cdrom.com>; from Mike Smith on Mon, Jan 25, 1999 at 03:24:41PM -0800
References:  <19990125181232.A1172@dmaddox.conterra.com> <199901252324.PAA12570@dingo.cdrom.com>

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On Mon, Jan 25, 1999 at 03:24:41PM -0800, Mike Smith wrote:
> I'm telling you that this constitutes "having trouble". 8)  

Ok, I'll accept that :-)

> $root_disk_unit should only be required if you have a discontinuity in 
> the chain of devices from bios disk 0x80 to your root device.
> 
> It would help *immensely* if you were a little forthcoming with eg. 
> what it is that you have to set $root_disk_unit to.  Also, as I've 
> tried to make clear here, changing the /etc/fstab entry for / is 
> *WRONG* and if you find yourself having to do this it's because 
> something is screwed elsewhere.

Ok.  First, the issue of currency.  As I stated earlier, all this
discussion is based on a kernel and world built Jan 24:

$ ls -l /boot
total 159
-r--r--r--  1 root  wheel     186 Jan 24 16:42 boot.conf
-r--r--r--  1 root  wheel     512 Jan 24 04:22 boot0
-r--r--r--  1 root  wheel     512 Jan 24 04:22 boot1
-r--r--r--  1 root  wheel    7680 Jan 24 04:22 boot2
-r--r--r--  1 root  wheel     159 Nov 26 12:23 kernel.conf
-r-xr-xr-x  1 root  wheel  126976 Jan 24 04:22 loader
-r--r--r--  1 root  wheel   10653 Jan 24 04:22 loader.help

This is what is currently in my boot.conf:

$ cat /boot/boot.conf
set num_ide_disks=2
set root_disk_unit=1
load kernel
load msdos
load procfs
load if_tun
load if_disc
load linux
load vesa
load joy
load -t userconfig_script /boot/kernel.conf
autoboot 3

With this boot.conf, I don't have to change my fstab.  If I remove
root_disk_unit, the / mount fails unless I change the device to
/dev/wd1a in fstab.

> Again, please *ensure* that your loader is fully up to date.  So far 
> everyone that's reported problems has been using an out-of-date loader.
> 
> -- 
> \\  Sometimes you're ahead,       \\  Mike Smith
> \\  sometimes you're behind.      \\  mike@smith.net.au
> \\  The race is long, and in the  \\  msmith@freebsd.org
> \\  end it's only with yourself.  \\  msmith@cdrom.com
> 
> 
> 

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