First, sorry for my bad English, I hope you will understand at least part of this post
Thing is, after upgrading from SW 12.1 to SW 12.2 and rebooting, I've got a problem I can't solve. System starts booting, and then when he gets to the point when it usually checks the root filesystem, only thing I get is ugly error message that informs me e2fsck can't find the superblock, and booting stops. It wont see /dev/hda2 (swap partition), and /dev/hda3 (root partition). Kernel I used with 12.1 was huge.smp, no initrd, and I didnt made any changes after upgrading, so I think it should use huge.smp again.. or I am wrong. Anyway, vmlinuz shortcut points to smp-huge-2.6.27.7-smp.
Anybody had the same problem, or maybe just knows what is going on?

Did you rerun lilo after your upgrade?

Yep, all "by book" or by "UPGRADE.TXT", but..
I fixed the problem, I was too nervous to wait, so I just did a clean install, and everything is ok now. This was a first (and a very last) time for me to do an upgrade, best way to skip problems is clean install.
However, I still don't know what was the problem there.

Are you *sure* you completely followed UPGRADE.TXT?
This sounds like you forgot to do this step:
mv /etc/rc.d/rc.udev.new /etc/rc.d/rc.udev
(along with moving/merging all the other .new files)

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On some machines a simple kernel parameter can make hdd that were /dev/hda look like /dev/sda instead. You could have had some disk corruption or perhaps other numerous causes for your problem.

I just posted a new Upgrade Howto for this release. Even though you did a fresh install you might want to check it out.

edit:
Just saw this:
That probably was your issue

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Yes, probably it was, as I can remember, I've fixed *some* .new config files, but I don't remember I did it with the udev configuration file.
My mistake. Thanx for answers guys!

Hello Andersen,

Run the following command to check any remaining *.new configuration file:

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