[ubuntu] Wrong disc size?

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http://ubuntuforums.org – I have just installed a rsync backup server with ubuntu server 12.04. I had to wait for the 2TB hdd to arrive, so i used a 80gb disc to set the system up. when the disc arrived, i used clonezilla with samba to clone the image over to the 2TB disc. Still, after changing image my disk shows the size of 72gb. What to do ? :) My guess is after i used clonezilla, the computer doesnt know it has a bigger disc. (Hardware)