root@ubuntu:~# fdisk -l

Disk /dev/hda: 160.0 GB, 160041885696 bytes
255 heads, 63 sectors/track, 19457 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

This doesn't look like a partition table
Probably you selected the wrong device.

   Device Boot      Start         End      Blocks   Id  System
/dev/hda1   ?      116388      126889    84344761   69  Unknown
Partition 1 does not end on cylinder boundary.
/dev/hda2   ?      105915      222310   934940732+  73  Unknown
Partition 2 does not end on cylinder boundary.
/dev/hda3   ?           1           1           0   74  Unknown
Partition 3 does not end on cylinder boundary.
/dev/hda4               1      213826  1717556736    0  Empty
Partition 4 does not end on cylinder boundary.

Partition table entries are not in disk order
root@ubuntu:~#