Date: Fri, 22 Jan 2010 13:33:37 -0500 From: Jerry McAllister <jerrymc@msu.edu> To: Billy Newsom <billy@nlcc.us> Cc: freebsd-questions@freebsd.org Subject: Re: How to troubleshoot a frozen boot sequence Message-ID: <20100122183337.GB22905@gizmo.acns.msu.edu> In-Reply-To: <4B59E61B.3090504@nlcc.us> References: <4B59E61B.3090504@nlcc.us>
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On Fri, Jan 22, 2010 at 11:53:31AM -0600, Billy Newsom wrote: > I am doing a test run on a production server. It has 2 hard drives. > > ad0 (mounted on /disk250 in a single slice plus SWAP) > twed0 (mounted on / /var /usr and a SWAP) > > The twed0 is a hardware mirror and my main drive. > ad0 is just for backups. > > What the issue is, and you probably know where I'm heading. The boot > process freezes if I remove the ad0 (to test a drive failure condition) > > It freezes after saying: > BTX boot loader.... etc. I don't see any indication that your ad0 has any provision for hotswap. It isn't in any raid setup. Try taking everything from /dev/ad0 out of /etc/fstab - including both the big partition and the swap partition and then rebooting. ////jerry > > FreeBSD/i386 bootstrap loader 1.1 > It spins for a second, then stops... unless I have ad0 in the computer. > /boot/kernel/kernel text=0x7b03a0 data=0xcdee0 / > > And it never gets to the boot menu. > > So: > > 1. Should I put a new boot0config on the twed0 drive? If so do I boot from > a CD to do that? > > I need to potentially do something also to my disk labels and my fstab so > that I don't boot to single user mode if drive ad0 fails. I haven't done > this exact type of thing before, so I am looking for a little help. > > my fstab: > /dev/ad0s1b none swap sw 0 0 > /dev/twed0s1b none swap sw 0 0 > /dev/twed0s1a / ufs rw 1 1 > /dev/ad0s1d /disk250 ufs rw 2 2 > /dev/twed0s1e /tmp ufs rw 2 2 > /dev/twed0s1f /usr ufs rw 2 2 > /dev/twed0s1d /var ufs rw 2 2 > /dev/acd0 /cdrom cd9660 ro,noauto 0 0 > > > I tried to read the MBR from the twed0 drive, and the program couldn't read > it. The one from the ad0 drive is readable and I saved a copy of it. > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org"
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