YB (Yota-byte) > ZB (Zeta-byte) > EB (Exa-byte) > PB (Peta-byte) > TB (Tera-byte) > GB (Giga-byte) > MB (Mega-byte) > KB (Kilo-byte) > Byte > Bit 1Byte = 8 Bit 1 KB = 1,024 Bytes 1 MB = 1,024 KB = 1,048,576 Bytes 1 GB = 1,024 MB = 1,048,576 KB = 1,073,741,824 Bytes 1 TB = 1,024 GB = 1,048,576 MB = 1,073,741,824 KB = 1,099,511,627,776 Bytes 1 PB = 1,024 TB = 1,048,576 GB = ... = 1,125,899,906,842,624 Bytes 1 EB = 1,024 PB = 1,048,576 TB = ... = 1,152,921,504,606,846,976 Bytes 1 ZB = 1,024 EB = ... = 1,180,591,620,717,411,303,424 Bytes 1 YB = 1,024 ZB = ... = 1,208,925,819,614,629,174,706,176 Bytes 今朝 YB是计较机界已知最大的储存空间单元. 以一个250GB的硬盘而言, 1YB就需要约4兆5千亿个这样的硬盘. 再大的单元恐怕在短期间内是还用不到的.