#100 Partition table is bad
The master boot record (MBR) can contain, at most, one extended partition, and each extended partition boot record (EPBR) can contain, at most, one link to another EPBR. This error occurs when a partition table violates the foregoing rule. It can also occur if you have more than one active partition. Since any modifications PartitionMagic makes may decrease the amount of data that is recoverable from the hard disk, PartitionMagic does not recognize any of the hard disk's partitions. If you must create new, error-free partition tables to resolve your problem, see Resolving partition table errors for instructions.