The computer system is pre-installed with the Linux system. After reinstalling the XP system, I found that the hard disk has changed from the original 250GB to 233GB. The capacity of the hard disk displayed in the operating system does not match the nominal capacity of the hard disk. It must be less than the nominal capacity. The larger the capacity, the greater the difference. It is caused by the difference between the calculation method of the capacity of the hard disk manufacturer and the calculation method of the operating system, that is, different unit conversion relationships. As we all know, the binary is used in the computer, which causes the calculation of the capacity in the operating system to be hexadecimal per 1024, 1KB per 1024 bytes, and 1MB per 1024KB. 1GB per 1024MB: The calculation capacity of hard disk manufacturers is based on a decimal of every 1000. 1KB per 1000 bytes, 1MB per 1000KB. 1GB per 1000MB, the difference between the two systems caused the hard disk Capacity "shrinks". Therefore, it is not surprising that the actual capacity of hard drives on the market differs from the nominal. Set the cubic power of 1000/1024 as the constant e, and use the constant e to easily calculate the approximate actual capacity of each hard disk. e = 0.931322574615478515625, with two decimal places, then e = O.93. Then the actual capacity of your 250GB hard drive is about 250x0.93 = 232.5GB.
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