$ sudo fdisk /dev/sda
Command (m for help): p
Disk /dev/sda: 257 MB, 257949696 bytes
8 heads, 62 sectors/track, 1015 cylinders
Units = cylinders of 496 * 512 = 253952 bytes
This doesn't look like a partition table
Probably you selected the wrong device.
Device Boot Start End Blocks Id System
/dev/sda1 ? 1568823 3870254 570754815+ 72 Unknown
Partition 1 has different physical/logical beginnings (non-Linux?):
phys=(357, 116, 40) logical=(1568822, 3, 11)
Partition 1 has different physical/logical endings:
phys=(357, 32, 45) logical=(3870253, 0, 51)
Partition 1 does not end on cylinder boundary.
/dev/sda2 ? 340100 4243383 968014120 65 Novell Netware 386
Partition 2 has different physical/logical beginnings (non-Linux?):
phys=(288, 115, 43) logical=(340099, 6, 47)
Partition 2 has different physical/logical endings:
phys=(367, 114, 50) logical=(4243382, 4, 42)
Partition 2 does not end on cylinder boundary.
/dev/sda3 ? 3769923 7673205 968014096 79 Unknown
Partition 3 has different physical/logical beginnings (non-Linux?):
phys=(366, 32, 33) logical=(3769922, 2, 30)
Partition 3 has different physical/logical endings:
phys=(357, 32, 43) logical=(7673204, 7, 39)
Partition 3 does not end on cylinder boundary.
/dev/sda4 ? 5817906 5818018 27749+ d Unknown
Partition 4 has different physical/logical beginnings (non-Linux?):
phys=(372, 97, 50) logical=(5817905, 4, 25)
Partition 4 has different physical/logical endings:
phys=(0, 10, 0) logical=(5818017, 3, 33)
Partition 4 does not end on cylinder boundary.
Partition table entries are not in disk order