Date: Fri, 12 Apr 2002 18:38:43 -0700 (PDT) From: User Tomdean <tomdean@speakeasy.org> To: freebsd-questions@FreeBSD.ORG Subject: How do I Create a Crash Dump? Message-ID: <200204130138.g3D1chF01203@celebris.tddhome>
next in thread | raw e-mail | index | archive | help
I have been chasing a problem and have been unable to get a crash dump. I want to create a dump using ddb and panic. So, I break into ddb and enter panic. Then 'call boot(0)' and the system reboots. The disks were not dismounted. Ok. When the system reboots, I see: ... dumpon: crash dumps to /dev/ad0s2b (116, 196609) Checking for core dump: dumplo = 570507264 (1114272 * 512) savecore: magic number mismatch (544c4645 != 8fca0101) savecore: no core dump ... How do I get past this point? I have makeoptions DEBUG=-g #Build kernel with gdb(1) debug symbols options DDB #debugger options BREAK_TO_DEBUGGER #a BREAK on a comconsole goes to #DDB, if available. options ALT_BREAK_TO_DEBUGGER in the kernel config. I have dumpdev="/dev/ad0s2b" # Device name to crashdump to (or NO). dumpdir="/var/crash" # Directory where crash dumps are to be stored savecore_flags="-v" # Used if dumpdev is enabled above, and present. in /etc/rc.conf tomdean To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200204130138.g3D1chF01203>