[kubuntu] Trouble Repairing EXT Partitions?

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http://ubuntuforums.org – I have 2 separate issues here with 2 separate HDDs. HDD 1. One HDD is reporting 0 space left in dolphin. However, I know I did not use up all the space, and KDE Partition Manager and Gparted show some free space as well. HDD 2. The other HDD refuses to mount in Kubuntu. It gives this error message when I try: Code: An error occurred while accessing 'Desktop', the system responded: The kernel driver for this filesystem type is not available.: Error mounting: mount: wrong fs type, bad option, bad superblock on /dev/sdd1,  missing codepage or helper program, or other error. In s (Hardware)