Re: bad shutdown
In article <[🔎] email@example.com>,
Silvan <firstname.lastname@example.org> wrote:
>I think I have a CD-ROM going south. I started the KDE CD ripper flummy, and
>then immediately stopped it. I wound up with a kaudiocreator process hung up
>eating system CPU cycles and making my hard disk do unpleasant sounding
>things filling the log up with "hdd lost interrupt" messages. The system was
>stable, but I didn't want to leave it doing that.
>So I closed everything out, logged off, waited a bit, and then rebooted. The
>last thing I saw before the reboot was a warning that /home was busy, and so
>was not umounted.
Makes sense. You probably hit a hardware or kernel bug. As a result some
processes (kaudiocreator) got stuck in kernel mode and kept all
filesystems they were using busy. At that point there is no way
to umount those filesystems.
>I booted into unclean/check forced mode on home and / both. Fortunately,
>there were no serious problems.
I never see serious problems even after a hard reboot. Ofcourse, I
use journalling filesystems everywhere (ext3 or xfs).
>Sure, I was having weird kernel interrupt problems, but it seems poorly
>conceived to me for the init scripts to take one shot at something as
>important as umounting everything, and then just say OK, to hell with it,
>let's reboot anyway.
Well, there's really nothing else to be done. What can be done?
Repair the hardware by magic and somehow re-initialize the kernel?
Rebooting is the safest way out. Note that the standard shutdown
sequence _does_ call sync() just before halt/reboot.
>I'm not sure what could have been done at that stage of the game, but I'm
>miffed I didn't even get the chance to try.
Because there's nothing to be done at that stage. Be glad that the
system did reboot (imagine if it's in some remote location).
>Anyone have any suggestions what I should do about this to increase the odds
>that this won't happen again. (Other than getting rid of the CD ripper
>flummy and trying to remember not to try to use the damn CD-ROM until I get
>it replaced, I mean.)
If you're using ext2, switch to ext3 (make sure your kernel supports
ext3, then tune2fs -j /dev/hdaX for all your filesystems, change ext2
to ext3 in /etc/fstab, shutdown -rF now).
The question is, what is a "manamanap".
The question is, who cares ?