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How does the Win7 system not reinstall the system split partition

[First Step] & ldquo; Computer & rdquo; & Rarr; Right click to open & ldquo; Management &

[Step 2] Click & ldquo; Disk Management & rdquo;

Start Partition Splitting
>[1] Select the disk partition to be split. Here, take the D disk as an example, select it, right click to open “ compressed volume &

[two] given the size of the disk partition to be drawn. Here is an example of drawing 30G. Then click "Compression" (the size of the split space is less than or equal to the size of the free space of the original disk)

[3] The partition is defined.

[4] Right click on the new Partition, open "New Simple Volume"

[5] Direct Next Windows7 Tutorial

[Six] The size of a given partition can be stored, of course, how much is specified?

[7] Assign the partition number. From the partition drawn from the D drive, E should be assigned here. Explain why later.

[8] Format the partition and set the basic properties. Directly next step

[9] Click Finish

[10] Partition splitting is completed. Compare it with the steps [five] and you will know why you want to format it.

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The hard disk generally has 255 heads and 63 sectors, so the size of each cylinder is:
512byte x 255 x 63=8225280bytes =7.84423828125 MB
If you want to divide 40GB, then 40x1024MB=40960MB
requires the number of cylinders is 40960÷ 7.84423828125=5221.66
takes an integer of 5222 cylinders
The number of M should be 5222x7.84423828125=40962.6123046875MB
No matter how many digits after the decimal point enter 1, which is 4,096MB, Windows thinks it is 40GB.
This method is universal for NTFS and FAT32.
Input value (MB)=[([X(GB)*1024/7.84423828125]+1)*7.84423828125]+1
The amount of compressed space in the front split 30G partition is 30726 instead of 30*1024= The reason for 30720 is this

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