硬盘的容量

blazex

事情是这样的，当我用window explorer，ntfsinfo 和 command line 的 chkdsk 来查看电脑 C drive 的容量时，发现三个程序所报告的disk space 或volume size 都不一致，如下图：

1）ntfsinfo
     volume size = 208892MB     

2) Properties
    Capacity = 203GB
     

3) chkdsk
     Total disk space = 213906431 KB
     

为什么会有这样的差别呢？

nick_khor

我所了解的方式：

图二
219,040,182,272 Bytes

1GB = 1024 Mega Bytes
1MB = 1024 Kilo Bytes
1KB = 1024 Bytes
1Bytes = 8 Bits

219,040,182,272 Bytes / 1024
= 213,906,428 Kilo Bytes (图三)

213,906,428 Kilo Bytes / 1024
= 208,892.99609375 Mega Bytes (图一)

208,892.99609375 Mega Bytes / 1024
= 203.997066497802734375 Giga Bytes （图二）

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补充：
NTFS 会保留 16 个 sector for MBR (Master Boot Record)，依据你的 ntfsinfo，每个 sector 是 512 bytes，所以 MBR 那边用了 8192 bytes；好，那我们从新算

(219,040,182,272 Bytes - 8192 Bytes) / 1024
= 213,906,420 Kilo Bytes

213,906,420 Kilo Bytes / 1024
= 208,892.98828125 Mega Bytes (图一)

你的 MFT (Master File Table) 占据了 627MB，所以
(208,892.98828125 Mega Bytes - 627 Mega Bytes) / 1024
= 203.384754180908203125 Giga Bytes
Round Up= 203 GB
我看到数目字就乱掰的，有错请纠正