GPT Partition Tables

• Replaces the MBR which was limited in size and sat on the first sector of a fixed disk
• Use LBA hard drive addressing
• The GPT header is in LBA1 which has a pointer to the Partition Table or a Partition Entry Array.
• The Partition Array, by UEFI standards must have a minimum 16,384 bytes which allows for addressing space to 18 Exabyte with up to 128 partitions.
• The GPT has a partition header that defines the tables characteristics. It lives always in LBA1.
• GUID is a system for uniquely identifying computing components as defined in the UUID Standrad. It is 32 Hex couples.