First, they're mount errors. Second, they're not errors, they're warnings. Neither one means that there is an error. Third, the one initially complained about is a very mild warning. Basically, the filesystem keeps track of how many times it's been mounted. Once it reaches a certain number of mounts, the mount utility suggests fscking it, just to be on the safe side. If this happens on boot, most Linux systems will automatically fsck it for you. The other warning means that there's a reasonable possibility of there being filesystem problems, as it wasn't unmounted, so there could be inconsistencies in the filesystem. But there might not be any errors, too. Just like powering off Windows without shutting down. Sorry for the partial repetition. Just trying to be clear.