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Because I am using one of the new WD disks I am trying to aling my root partition with the real sectors, as described here:

So I copied all files to a temp location, deleted my partition (/dev/sda3), recreated it a few cylinders later (same name) and copied the files to the newly created partition. But now when I try to boot, I get my old grub menu but after selecting my kernel version it hangs... Any idea how I can fix it?

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It just hangs with no error message? – edk May 15 '10 at 22:40
The only error message I get is "Loading Linux 2.6.32-trunk-686 ...", no error message – Grzenio May 16 '10 at 6:27
up vote 1 down vote accepted

Fixed now - the problem was that the partitions UUID has changed as an effect of my actions so I had to update /boot/grub/grub.cfg with the new ids, which I got by running (as root):

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