Precautions for installing Windows seven o'clock data partitions

Windows 7 is slightly different from Vista during installation. Windows 7 stores all the core startup files in a small partition with a size of only MB, there is a prompt when installing Windows 7 and creating a partition. It is said that the purpose of this operation is to make the system start faster and more secure and stable. This MB partition is hidden by default, and the system will not assign a drive letter to it.

　　

 

You can see a MB hidden partition in the disk manager.

　　

 

Show full 50 GB in my computer

If you want to partition the system disk of Windows 7, you need to add 100 MB to the capacity calculated by the integer partition calculator. If you want to partition a 50 gb ntfs partition, calculated by using the calculator above, it is 51208 MB, and the actual input is 51308 MB. In this way, Win7 will automatically split a MB hidden partition and an integer 50 GB partition. If it is another partition, you do not need to add 100MB.

● Hard disk capacity and partition capacity display:

To display a partition as an integer, it is not that simple. The following is a detailed analysis of the mystery of Hard Disk Partition capacity display:

1. for ease of conversion, hard disk manufacturers calculate hard disk capacity according to the thousands. The actual size of a 1 TB hard disk is 1,000,000,000,000 Bit = 976,562,500 KB = 953,674 MB = about GB, the actual available capacity will be smaller After partitioning;

2. The actual hard disk capacity calculated by the operating system is in decimal order. As a result, the actual available capacity is smaller than the nominal capacity. The larger the hard disk capacity, the larger the "loss" capacity;

3. The partition size actually displayed in the computer is not designed by the hard disk manufacturer or the operating system, but has another error. The reason is that after partitioning and formatting the hard disk, it also occupies a certain amount of space on the hard disk to store information such as the disk structure and data location;

4. for FAT32 partitions, each 1024 bytes of available capacity uses 4 bytes to store information such as the disk structure and data storage location, but the first GB of available capacity in the partition does not occupy additional storage capacity, therefore, the formula for FAT32 integer partitioning is:

　　MB allocation = (GB partition-1) × 4 + 1024 × GB Partition

5. The principle of NTFS partitioning is more complex. The minimum capacity unit of an NTFS partition cannot be accurate to 1 MB, but the cylindrical size. The hard disk generally has 255 heads and 63 sectors, so the size of each cylinder is: 512bitx255x63 = 8225280bit = 7.84423828125 MB.

If the score is 10 GB, the value should be 10x1024 MB = 10240 MB.

The actual number of cylinders is 10240 ?. 84423828125 = 1305.4

The cylinder can only be an integer, that is, 1306 cylinders.

In this case, the actual number of MB is 1306x7.84423828125 = 10244.575 MB.

The number of digits after the decimal point is 1, or 10245 MB, so that the system can recognize it as 10.0 GB.