GPT MBR Flag Starting CHS Partition Type Ending CHS Starting LBA Size 00 000302 06 E17FFE 00000080 00763780 *Data is in an IA32-based system, Little endian (least significant byte is first) GPT vs MBR MBR = 32bit, GPT = 64bit GPT has a backup Partition Table located at Last LBA n-1 and a backup GPT Header located at Last LBA n MBR has a maximum of 4 partitions GPT has a maximum of 128 partitions MBR Partition Table allows for up to 2.2 TB (2.20 × 10 12 bytes) GPT allows for up to 9.4 ZB (9.4 × 10 21 bytes) GPT allows for each partition to have a 36 character Unicode name The odds of generated two identical guids is 1 in 5,316,911,983,139,663,491,615,228,241,121,400,000 GUIDs are stored as 128-bit values, and are displayed as 32 hexadecimal digits GUID Partition Table Globally Unique Identifier Master Boot Record GPT header (LBA 1) Protective MBR (LBA 0) Marley Jaffe marleyjaffe.com Partition table (LBA 2)