Date: Fri, 19 Feb 1999 18:23:51 +0200 (SAT) From: Robert Nordier <rnordier@nordier.com> To: kjhmdjd@ix.netcom.com (KJH) Cc: stable@freebsd.org Subject: Re: Crash at bootup; ?Boot blocks problem - please help! Message-ID: <199902191623.SAA09720@ceia.nordier.com> In-Reply-To: <000001be5b4e$d975b820$0405a8c0@bigdog> from KJH at "Feb 18, 99 08:56:22 am"
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> I've just upgraded from 3.0-RELEASE (all ELF except the kernel) to
> the -STABLE branch via cvsup with the RELENG_3 tag.
>
> I have 2 partitions - a DOS FAT partition (wd0s1)
> and a FreeBSD partition (wd0S2)
>
> "make world" went fine with the new -STABLE sources.
>
> edited the kernel config file and rebuilt a new ELF
> kernel ("make depend"; "make"; "make install") - went fine
>
> updated my boot blocks (or so I thought) with:
>
> "disklabel -B wd0" (and after trouble struck, tried
> "disklabel -B wd0s2" and
> "disklabel -B -b /boot/boot1 -s /boot/boot2 wd0" and
> "disklabel -B -b /boot/boot1 -s /boot/boot2 wd0s2" without
> any success ...)
>
> but now, at each reboot, the machine crashes and burns with:
>
>
> F1 ... Dos
> F2 ... FreeBSD
>
> Default: F2
>
> int=0000000d err=00000000 efl=00030097 elp=00000f18
> eax=00000800 ebx=00000000 ecx=00000000 edx=00000080
> esi=00000000 edi=00000000 ebp=00000000 esp=00000408
> cs=c800 ds=0000 es=0000 fs=0000 gs=0000 ss=9edb
> cs:eip=0f 20 c0 66 a9 00 00 00-80 66 58 75 14 80 fc 00
> ss:esp=00 08 00 00 02 00 87 91-00 00 02 02 00 00 00 00
> System halted
>
> Needless to say, this never happened with 2.2-STABLE or
> 3.0-RELEASE.
> The MBR is OK because I can still boot into the DOS partition.
>
> Obviously I've done something stupid. I've read the handbook;
> the "ELF day" page, and the "Notes on the new bootblocks" page;
> I've tried fixing this from the fixit floppy, but right now
> I'm stuck with an unbootable machine. Please help!
You didn't do anything stupid. Some firmware on the machine
(probably the hard disk BIOS) is using a V86 instruction which is
not presently supported by BTX, which hosts the new boot code.
Please send me the output of
dd if=/dev/mem bs=1024 skip=800 count=16
so I can see what is going on, and I'll let you have a revised set
of boot blocks to try.
--
Robert Nordier
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