单位换算

International System of Units (SI) prefixes are decimal:

kilo- (K) = 10^3  = 1,000
mega- (M) = 10^6  = 1,000,000
giga- (G) = 10^9  = 1,000,000,000
tera- (T) = 10^12 = 1,000,000,000,000
peta- (P) = 10^15 = 1,000,000,000,000,000
exa-  (E) = 10^18 = 1,000,000,000,000,000,000

The International Electrotechnical Commission (IEC) prefixes are binary:

kibi- (Ki) = 2^10 = 1,024
mebi- (Mi) = 2^20 = 1,048,576
gibi- (Gi) = 2^30 = 1,073,741,824
tebi- (Ti) = 2^40 = 1,099,511,627,776
pebi- (Pi) = 2^50 = 1,125,899,906,842,624
exbi- (Ei) = 2^60 = 1,152,921,504,606,846,976

一块 2T 的硬盘，使用不同进制表示容量时是不一样的：

使用十进制算法容量为 2 * 10^12 = 2,000,000,000,000 bytes

使用二进制算法容量为 2 * 2^40 = 2,199,023,255,552 bytes

2 * 10^12 / 2 * 2^40 = 0.9 两者相差 10%

1.82 TiB 的硬盘使用 terabytes(TB) 为单位时，会显示为 2 TB

案例：1 Gb/s = ? MiB/s

解析：

1 Gb = 1 * 10^9 / 8 Bytes

1 MiB = 1 * 2^20 Bytes

故：

1 * 10^9 / 8 / 2^20 ≈ 119.2

1 Gb/s = 119.2 MiB/s