其中有这么一段:
The GUID Partition Table disk partition format is well defined and fully self-identifying. Data that is critical to the operating system is located in partitions and not in unpartitioned or "hidden" sectors. GUID Partition Table does not allow for hidden sectors or partitions. GUID Partition Table disks use primary and backup partition tables for redundancy and CRC32 fields for improved partition data structure integrity. The GUID Partition Table partition format uses version number and size fields for future expansion.