 On Windows NT operating systems the codice_2 command options codice_29 and codice_30 correspond to the maximal cluster size codice_31 (128) with a sector size 1024 and 2048, respectively.For the common sector size 512 codice_32 yields 128 sectors per cluster.Both editions of each ECMA-107 and ISO/IEC 9293 specify a "Max Cluster Number" codice_33 determined by the formula codice_34, and reserve cluster numbers codice_35 up to 4086 (0xFF6, FAT12) and later 65526 (0xFFF6, FAT16) for future standardization.