Date: Sun, 26 Oct 2008 09:09:07 +0300 From: Roman Bogorodskiy <novel@FreeBSD.org> To: freebsd-hackers@freebsd.org Subject: problems obtaining kernel dump Message-ID: <20081026060906.GA66894@underworld.novel.ru>
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Hello, I'm having a problem obtaining kernel dump. The box has 512Mb of RAM. In rc.conf I have: dumpdev="/dev/ad4s1b" dumpdir="/var/crash" swapinfo -h gives the following: Device 1K-blocks Used Avail Capacity /dev/ad4s1b 1048576 0B 1.0G 0% /var/crash directory exists, and the root partition where it is placed has enough space as well: /dev/ad4s1a 989M 350M 560M 38% / The box runs fresh FreeBSD/i386 -CURRENT. So, I do swapoff and then perform actions to reproduce the crash and it breaks me into ddb prompt. I do: call doadump continue it reboots, and when I run "savecore -v /var/crash /dev/ad4s1b" it prints: unable to open bounds file, using 0 checking for kernel dump on device /dev/ad4s1b mediasize = 1073741824 sectorsize = 512 magic mismatch on last dump header on /dev/ad4s1b savecore: no dumps found The same happens when I do 'panic' instead of 'call doadump' like handbook suggests. What am I doing wrong? I googled for similar problems, found some mail threads but didn't find meaningful advises though. Roman Bogorodskiy
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