Ubuntu Installation :: Missing Half Of HD After Partitioning

I recently upgraded from XP to Kubuntu, and I noticed that during partitioning (during installation) I could only partition 80GB out of the 160GB I should have.

Code:
df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda1 71G 2.8G 64G 5% /
none 719M 296K 718M 1% /dev
none 723M 0 723M 0% /dev/shm
none 723M 92K 723M 1% /var/run
none 723M 0 723M 0% /var/lock
none 723M 0 723M 0% /lib/init/rw
none 71G 2.8G 64G 5% /var/lib/ureadahead/debugfs
/dev/sdb1 7.1G 5.8G 964M 86% /media/disk

Code:
sudo fdisk -l | grep Disk
Disk /dev/sda: 80.0 GB, 80026361856 bytes
Disk identifier: 0x000ed7ef
Disk /dev/sdb: 8004 MB, 8004132864 bytes
Disk identifier: 0x000a154d

Also, at Grub there are several old Ubuntu selections from a previous install I did a long time ago; not the next oldest 1 or 2 Kubuntu versions, older Ubuntu versions.