Disk /dev/sdb: 3933 MB, 3933732864 bytes
122 heads, 62 sectors/track, 1015 cylinders
Units = cylinders of 7564 * 512 = 3872768 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x6f20736b
This doesn't look like a partition table
Probably you selected the wrong device.
Device Boot Start End Blocks Id System
/dev/sdb1 ? 102874 253788 570754815+ 72 Unknown
Partition 1 does not end on cylinder boundary.
/dev/sdb2 ? 22302 278255 968014120 65 Novell Netware 386
Partition 2 does not end on cylinder boundary.
/dev/sdb3 ? 247209 503161 968014096 79 Unknown
Partition 3 does not end on cylinder boundary.
/dev/sdb4 ? 381503 381510 27749+ d Unknown
Partition 4 does not end on cylinder boundary.