Fsck errors in the Linux filesystem on my OpenBSD laptop NOT caused by OpenBSD

I've been able to have OpenBSD's /etc/fstab automatically mount the ext2 filesystem on my Compaq Armada 7770dmt's hard drive with no difficulty lately, but every couple of days or so I get a message while booting OpenBSD that says the Linux filesystem is not clean and that I should run fsck on it.

I then boot Puppy Linux 2.13, run e2fsck on the partition, the errors are cleared up, and all is well until a few more days pass.

I haven't lost any data, but I'm going to do a few experiments.

First, I added noauto to the /etc/fstab line so the Linux filesystem will not be automatically mounted. Then I'm going to run Puppy for a few days and check the filesystem with e2fsck.

It could be that the errors are coming from Puppy alone. I think that's unlikely, but it is a possibility.

Then I'll experiment with manually mounting (with mount) and unmounting (with umount) the Linux filesystem while in OpenBSD.

That way I can see whether or not automounting and unmounting the ext2 filesystem in OpenBSD is what's causing the problem.

Hours later: Looks like OpenBSD is NOT responsible. I ran Puppy totally in RAM (using the puppy pfix=ram boot parameter), than ran e2fsck to clean up the filesystem on my ext2 partition. Then I ran Puppy the "normal" way, in which the system mounts the partition to access the pup_save file. I then rebooted and once again ran Puppy without mounting the partition. At no time did I boot OpenBSD or mount the filesystem in that OS.

Once I was back in Puppy, running pfix=ram to keep the partition unmounted, I ran e2fsck and got this message:

/dev/hda3 was not cleanly unmounted, check forced.

I had one more test to do.

Now that I had run e2fsck on the ext2 filesystem, I needed to boot OpenBSD, mount the filesystem, write a file to it, then unmount it. After that, it would be time to boot Puppy Linux again, using the pfix=ram boot parameter again so as not to mount the filesystem in Linux, and then run e2fsck again to check the filesystem and see if mounting, writing to and then unmounting it caused any errors.

So I booted into OpenBSD 4.2, mounted the ext2 filesystem, modified a few files, added a few, then unmounted it. I rebooted and did the same thing again.

Then I booted into Puppy, again with the pfix=ram boot parameter so as not to mount the Linux partition.

I ran e2fsck. After two boots of OpenBSD, during which I modified files in the Linux filesystem both times, there were no errors in the ext2 filesystem.

I said it was "unlikely," but in fact it's Puppy Linux, NOT OpenBSD that is not "cleanly" unmounting the Linux filesystem. I truly expected it to be the other way around.

I'll have to test this with Damn Small Linux, Wolvix and maybe even Slitaz to see if this is a Linux problem, or just a Puppy (or Puppy 2.13, to be more specific) problem. But right now, OpenBSD has absolutely nothing to do with it.

Mounting the filesystem in:

Damn Small Linux 4.3 caused no errors