Originally Posted by etech3
Try running from the command line:
will only show the size of mounted partitions, not the harddisk size. For the harddisk size try
This will show up the total size of a harddisk and the partitions and unpartitioned space (if any).
Keep in mind that you have to be root for the fdisk command to work correctly. So, depending on the distro you use. use either sudo or su to get root privileges.