Panic on boot. How do I get a kernel dump.
kris at obsecurity.org
Fri Apr 27 01:43:20 UTC 2007
On Thu, Apr 26, 2007 at 06:37:42PM -0700, Steve Kargl wrote:
> On Fri, Apr 27, 2007 at 09:24:02AM +0800, Wilkinson, Alex wrote:
> > 0n Thu, Apr 26, 2007 at 03:35:15PM -0700, Tom Cumming wrote:
> >>The problem is not getting it to panic, the problem is getting it to save
> >>core after the panic. I can find no way to configure the dump device before
> >>I boot, only after the OS is up. This means a panic during boot will not
> >>dump core because the dump device is not configured.
> > Boot off of a good kernel and:
> > # boot -s
> > # fsck -p
> > # mount /var
> > # savecore /kernel.broken /var/crash
> > -aW
> Re-read the text that you quoted. Tom doesn't have
> dumpdev set, so there is no core for savecore to
> retrieve. ISTR, that one could set dumpdev in the
> loader. At the loader prompt, do
> set dumpdev="/dev/ad0s2b"
I don't think this has existed for many years (it was removed during
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