最精确的硬盘整数分区法

分区大小（举例）分区时应该输入的数字

10G10245

20G20482

30G30726

40G40963

50G51208

60G61444

70G71681

80G81926

90G92162

100G102407

110G112644

120G122888

130G133125

140G143362

150G153606

160G163843

170G174088

180G184324

190G194561

200G204806

210G215042

220G225287

230G235524

240G245768

250G256005

260G266242

270G276486

280G286723

290G296968

300G307204

310G317441

320G327686

330G337922

340G348167

350G358404

360G368648

370G378885

380G389122

390G399366

400G409603 410G419848 420G430084 430G440321 440G450566 450G460802 460G471047 470G481284 480G491528 490G501765 500G512002

7.844238281250

255磁头，63扇区，故每柱面大小为：

x255x63＝8225280bytes＝7.84423828125MB如果要分40GB,那么要40x1024MB=40960MB需要柱面数为40960÷7.84423828125=5221.66取整数既为5222个柱面应分M数为5222x7.84423828125=40962.6123046875MB

不管小数点后面几位都进1，也就是40963MB，windows就认为是40GB了。这个方法NTFS 和FAT32通用。