The computer system is pre-installed with the Linux system. After reinstalling the XP system, it is 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, and the capacity is less than the nominal capacity. The larger the capacity, the greater the difference. This is not the case that the manufacturer or the dealer shoddy the consumer. 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, the different unit conversion relationship.
It is well known that binary is used in computers, which results in the calculation of the capacity in the operating system in 1024, which is 1 KB per 1024 bytes and 1 MB per 1024 KB. Every 1024MB is 1GB: The hard disk manufacturer is in the calculation of the capacity is 1000 per 1000. Each 1000 bytes is 1KB, 1MB per 1000KB. Each 1000MB is 1GB, the difference between the two causes the hard disk. The capacity is "shrinking".
Therefore, it is not surprising that the actual capacity of the commercially available hard disk differs from the nominal.
By setting the cube of 1000/1024 to the constant e, it is easier to calculate the approximate actual capacity of each hard disk using the constant e. e=0.931322574615478515625, retaining two decimal places, then e=O.93. Then your 250GB hard drive has a real capacity of about 250x0.93=232.5GB.
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