最小的基本单位是bit，
按顺序给出所有单位：
bit、
Byte、KB、MB、GB、TB、PB、EB、ZB、YB、BB、NB、DB。
它们按照进率1024（2的十次方）来计算：
1 Byte =8 bit
1
KB = 1,024 Bytes = 8192 bit
1
MB = 1,024 KB = 1,048,576 Bytes
1
GB = 1,024 MB = 1,048,576 KB
1
TB = 1,024 GB = 1,048,576 MB
1
PB = 1,024 TB = 1,048,576 GB
1
EB = 1,024 PB = 1,048,576 TB
1
ZB = 1,024 EB = 1,048,576 PB
1
YB = 1,024 ZB = 1,048,576 EB
1
BB = 1,024 YB = 1,048,576 ZB
1
NB = 1,024 BB = 1,048,576 YB
1
DB = 1,024 NB = 1,048,576 BB
全称：
1,000 Bytes = 1 Kilobyte
1,000Kilobytes = 1 Megabyte
1,000 Megabytes = 1 Gigabyte
1,000 Gigabytes = 1Terabyte
1,000 Terabytes = 1 Petabyte
1,000 Petabytes = 1 Exabyte
1,000Exabytes = 1 Zettabyte
1,000 Zettabytes = 1 Yottabyte
1,000 Yottabytes = 1Brontobyte
1,000 Brontobytes = 1 Geopbyte
Tips：数据的单位
原文：http://www.cnblogs.com/Itwonderful/p/5451869.html
