GUID Partition Table
struct gpt_header { uint64_t signature; uint32_t revision; uint32_t header_size; uint32_t header_crc32; uint32_t reserved; uint64_t current_lba; uint64_t backup_lba; uint64_t first_usable_lba; uint64_t last_usable_lba; uint8_t disk_guid[16]; uint64_t partition_entry_lba; uint32_t num_partition_entries; uint32_t size_of_partition_entry; uint32_t partition_crc32; uint8_t reserved2[420];};struct gpt_partition_entry { uint8_t type_guid[16]; uint8_t unique_guid[16]; uint64_t first_lba; uint64_t last_lba; uint64_t attributes; uint16_t name[36];};