Originally Posted by Emerson
If sda1 is your /boot partition and has actually ext2 filesystem then you can safely ignore this message.
In my case its not sda1, but hda1 and my /boot partition is ext2.
I was getting same warning and I figured out how to solve this. The problem was, that filesystem was created with journaling. I used tune2fs to remove journaling from filesystem like that:
tune2fs -O ^has_journal /dev/hda1
And now it boots up nicely. To look, if fs has journaling ( ext fs ) use tune2fs:
tune2fs -l /dev/partition