I was upgrading to karmic, then an error occurred. Now, when I try to turn my computer on, appears the following error:

one or more of the mounts listed in /etc/fstab cannot yet be mounted

I removed all items on fstab and the error persists. Can't run dpkg --configure, it returns that was impossible, the file system was read-only. I tryed fsck also, but there was no problem.