Since block addresses and sizes are stored in the partition table of an MBR using 32 bits, the maximum size, as well as the highest start address, of a partition using drives that have 512-byte sectors (actual or emulated) cannot exceed 2 TiB−512 bytes (2199023255040 bytes or 4294967295 (232−1) sectors × 512 (29) bytes per sector).[2] Alleviating this capacity limitation was one of the prime motivations for the development of the GPT.