MBR 最大定址能力是 2^32x512(block size) = 2T
所以最大分割區或最後一個分割區的起始位置要位於硬碟的前 2T 空間內,
也就是說, 使用 MBR, 最大只能用 < 4T 的硬碟 (分成 1.99T + 1.99T)
以硬碟廠商的計算方式, 4T 的硬碟實際上只有 3.7T 左右, 仍可以使用 MBR,
例如分成 1.9T + 1.8T
或 1T + 0.8T + 1.9T 都可以,
但是像 1.2T + 1.2T + 1.3T 是不行的, 因為最後一個分割區的起始位置超過 2T,
超過 4T 的硬碟(應該 2010 年就可以看到了), 需使用 GPT 才能使用到全部的容量, GPT 支援到 18E 的容量, 比較新的 OS 都有支援.
(1E=1024P, 1P=1024T)
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