I have an external 2TB Western Digital hdd (besides my 2 internal hdds, so this makes hime /dev/sdc). After loading grub, I have seen a quick error message.
After checking the log file: /var/log/boot.log I can see it more clearly:
xxx@xxx:~$ cat /var/log/boot.log fsck from util-linux 2.20.1 ata_id: HDIO_GET_IDENTITY failed for '/dev/sdc': Invalid argument
Any thoughts? Should I be worried?