Date: Thu, 20 Aug 2009 19:36:39 -0700 From: Scott Schappell <archon@silvertree.org> To: freebsd-questions@freebsd.org Subject: Re: Remounting a drive as read/write crashes the system and no dmesg.boot Message-ID: <4A8E0837.5020608@silvertree.org> In-Reply-To: <200908201531.06222.mel.flynn%2Bfbsd.questions@mailing.thruhere.net> References: <00B06063-9872-4ACE-8767-1221C22E33EE@silvertree.org> <200908201442.06321.mel.flynn%2Bfbsd.questions@mailing.thruhere.net> <465A1012-147B-449A-992A-91C1458EDB3F@silvertree.org> <200908201531.06222.mel.flynn%2Bfbsd.questions@mailing.thruhere.net>
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On 8/20/2009 4:31 PM, Mel Flynn wrote: > > http://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/kerneldebug.html OK, /backup was mounted read only, I did the following umount /backup mount -o rw /backup [root@arthur ~]# dd if=/dev/zero of=/backup/testfile bs=1024 dd: /backup/testfile: end of device 21122+0 records in 21121+0 records out 21627904 bytes transferred in 2.215991 secs (9759924 bytes/sec) [root@arthur ~]# You can see by that snippet it barfed at 21627094 bytes (21 megabytes, ish). /backup has 100s of GiB free. Filesystem Size Used Avail Capacity Mounted on /dev/ad0s1a 9.7G 453M 8.5G 5% / devfs 1.0K 1.0K 0B 100% /dev /dev/ad0s1d 15G 481M 13G 4% /var /dev/ad0s1e 15G 3.1G 10G 23% /usr /dev/ad0s1f 15G 1.4G 12G 10% /usr/local /dev/ad0s1g 216G 3.5G 195G 2% /home /dev/ad2s1d 226G 32G 176G 15% /backup I cannot get the system to generate a dump, even though dumpon verified it's set to the swap drive but /var/crash stays empty. I have dumpdev=AUTO in rc.conf and dumpdir=/var/crash as well. Could this have anything to do with how I added the drive? I followed the handbook instructions but maybe I messed it up.
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