spa:~# fdisk -l /dev/sda

Disk /dev/sda: 512 MB, 512229376 bytes
16 heads, 62 sectors/track, 1008 cylinders
Units = cylinders of 992 * 512 = 507904 bytes
Disk identifier: 0x59c07261

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

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   ?     4281600     8492928  2088818490    1  FAT12
Partition 1 has different physical/logical beginnings (non-Linux?):
     phys=(124, 38, 11) logical=(4281599, 9, 16)
Partition 1 has different physical/logical endings:
     phys=(344, 195, 26) logical=(8492927, 2, 53)
Partition 1 does not end on cylinder boundary.
/dev/sda2   ?     1082629     5161309  2023024920+  42  SFS
Partition 2 has different physical/logical beginnings (non-Linux?):
     phys=(453, 241, 50) logical=(1082628, 12, 21)
Partition 2 has different physical/logical endings:
     phys=(26, 59, 22) logical=(5161308, 0, 45)
Partition 2 does not end on cylinder boundary.
/dev/sda3   ?     1715327     1715991      329394   6f  Unknown
Partition 3 has different physical/logical beginnings (non-Linux?):
     phys=(367, 183, 2) logical=(1715326, 4, 42)
Partition 3 has different physical/logical endings:
     phys=(102, 116, 32) logical=(1715990, 6, 17)
Partition 3 does not end on cylinder boundary.
/dev/sda4         1409641     2510044   545800106+  49  Unknown
Partition 4 has different physical/logical beginnings (non-Linux?):
     phys=(332, 76, 4) logical=(1409640, 0, 33)
Partition 4 has different physical/logical endings:
     phys=(344, 78, 21) logical=(2510043, 7, 35)
Partition 4 does not end on cylinder boundary.

Partition table entries are not in disk order
spa:~#