6.3 reboot -d doesn't work

[Jeremy Chadwick]

On Wed, Sep 17, 2008 at 07:36:46AM -0400, Stephen Clark wrote:
> I am trying to get a crash dump but am unable to with FreeBSD 6.3-RELEASE-p2
>
> /etc/defaults/rc.conf
> dumpdir="/var/crash"    # Directory where crash dumps are to be stored
> savecore_flags=""       # Used if dumpdev is enabled above, and present.
>
> Z2873# sysctl -a |grep physmem
> hw.physmem: 259481600
> Swap: 1024M Total, 1024M Free
> Z2873# dumpon -v /dev/ad0s1b
> kernel dumps on /dev/ad0s1b
>
> reboot -d
> ...
> dumping 255M 2 chunks
>
>
> Then nothing - the system doesn't reboot and I have to hard reset it.
> When it comes back up there is no crash file in /var/crash
>
> from /var/log/messages:
> Sep 17 07:28:12 Z2873 kernel: ad0: 28615MB <IBM DJSA-230 JS6OAB0A> at  
> ata0-master UDMA66
> Sep 17 07:28:12 Z2873 kernel: Trying to mount root from ufs:/dev/ad0s1a
> Sep 17 07:28:12 Z2873 savecore: no dumps found
>
> Is this broken?

It's a known problem.  If when the machine reboots, you forcefully enter
single-user, you should be able to get the kernel dump using savecore.

http://www.freebsd.org/cgi/query-pr.cgi?pr=conf/118255

-- 
| Jeremy Chadwick                                jdc at parodius.com |
| Parodius Networking                       http://www.parodius.com/ |
| UNIX Systems Administrator                  Mountain View, CA, USA |
| Making life hard for others since 1977.              PGP: 4BD6C0CB |