Date: Fri, 28 Feb 2003 16:56:32 -0800 From: Mark Laws <mdl@60hz.org> To: Bruce M Simpson <bms@spc.org>, freebsd-hackers@freebsd.org Subject: Re: /bin/loader panic Message-ID: <20030301005632.GA53698@urusai.60hz.org> In-Reply-To: <20030225092242.GA25509@spc.org> References: <20030225075836.GA21972@urusai.60hz.org> <20030225092242.GA25509@spc.org>
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On Tue, Feb 25, 2003 at 09:22:42AM +0000, Bruce M Simpson wrote: > On Mon, Feb 24, 2003 at 11:58:36PM -0800, Mark Laws wrote: > > During the boot sequence, /boot/loader panics with something about > > "guard1" and reboots. The system in question is a Pentium running > > 4.7-STABLE from February 12, 2003; however, this problem has been > > occurring for at _least_ six months now. I have tried installing new boot > > code into the slice using disklabel as well as updating the MBR. Do any > > of you know what may be causing this and/or how to fix it? Any help > > would be appreciated. > > > > I am unable to provide the text that appears around the time that it > > panics; it reboots too fast. Is there is a way to get it to pause before > > it reboots or wait for a keypress or something? > > If it's managing to execute the loader, then the problem lies there; both > the root slice boot blocks and the MBR are executed before the loader. > > Try booting from fixit media, mount up your root disk, create a file > /boot/loader.conf.local in vi and put: > > console="comconsole" > > Then attach a null modem cable to COM1 on the affected machine, and connect > to this from another machine using your favorite terminal program at > 9600 8-N-1. > > This should allow you to capture the messages which the loader generates, > providing there isn't something wrong at a lower level. > > BMS OK, here's what I get: *** Console: serial port BIOS drive A: is disk4 BIOS drive C: is disk5 BIOS 640kB/130048kB available memory FreeBSD/i386 bootstrap loader, Revision 0.8 (root@himitsu.60hz.org, Thu Feb 13 22:44:59 PST 2003) Can't work out which disk we are booting from. Guessed BIOS device 0xffffffff not found by probes, defaulting to disk0: panic: free: guard1 fail @ 0x375b4 *** -- Mark Laws mdl@60hz.org http://www.60hz.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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