On Fri, Nov 29, 2002 at 09:41:56AM -0500, Wesley Morgan <[EMAIL PROTECTED]> wrote:
> Yesterday morning I was having some trouble with XFree consuming much more > cpu time than necessary... A truss showed that some kind of shared memory > issue going on, but also froze my system hard. After rebooting (kernel was > from Nov 26 or 27) fsck could not check my one dirty UFS2 partition. Had > to newfs and mtree to recreate /var. No big deal, and I saved an image of > it beforehand. > > After rebooting, there was... NOTHING. GRUB errored out and wouldn't boot. > Nothing could see my partitions. After a minimal 4.7-R install (DP2 > disklabel whined about offsets and some other STRANGE error messages, > so I went with 4.7) on a small fat32 partition, I discovered that the > disklabel was empty. Had to edit it by hand... Booted up fine, made > a backup, rebooted, and nothing. Not only was there NOTHING, but the > disklabel on the new 4.7 install had vanished as well. This time the > disklabel had to be recreated with -w -r AND the boot blocks had to be > reinstalled. > > I've seen one post similar to this, but not much else. I think maybe the > UFS2 problem had to do with Kirk's recent changes, but the disklabel > issue... I'm wary to reboot my machine! What in the hell could be causing > this? I'm tempted to point the finger at GEOM, but hate to say anything > like that. Same here today. I had system from Nov 21, both world and kernel. Did buildworld, installworld and then rebooted with old 21Nov kernel. At boot fsck whined about /usr (ad0s1d) partition and died with incorrect superblock message leaving the system in single user. The /usr partition has UFS2 filesystem. Why the partition had to be fsck'ed? The system went down cleanly after build-installworld. I tried to fsck_ffs -b 32 /usr but it didn't like it either and died with signal 8. Floating point exception. I know the next alternate superblock _is_ there at 32, because I converted /usr to UFS2 only few days ago and remember the newfs command exactly. After the failed attempt of fsck_ffs -b 32 suddenly some fragment of recent -current talk popped in my mind and I remember there was talk about mount command doing some trickery. So I went with mount -t ufs -f /dev/ad0s1d /usr and voila the data was there. I'm almost sure that I can reproduce it, because I have the / and /usr dumps from the time I did UFS2 converting and the live-current cd burnt for this purpose (JPSNAP). It's possible to go back in time and fully restore the system as it were before. -- Vallo Kallaste [EMAIL PROTECTED] To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
