Computer hard disk partition management system

Hard disk partition is in essence a formatted for hard drives, and then you can use the hard disk to save all kinds of information. Create partitions, it has been set up all the physical parameters of the hard disk, specifies the hard disk Master Boot Record (the Master Boot Record,Partition Wizard generally referred to as the MBR) and Boot Record backup storage location. For the file system as well as other information required to operate a system management hard disk by senior after formatting, namely the Format command. It can only create a partition using all or part of the hard drive space. But no matter how many partitions are divided, no matter use SCSI hard drives or IDE hard disk, must be set as primary partition of the hard drive activity partition,Technician Edition
can only through the hard disk boot system, at ordinary times when we are to hard disk partition, partition size is according to the 1024 m = 1 g to set, but it points out the partition size is not always what we want an integer. For example, we want to put the plate is divided into 10 g, and C and partition to fill in size: 10240 m. but the partitioned show is 9. XXG. What reason is this?
Calculation formula of the reason is that we have a problem: can't simply to set as 1024 m = 1 g, the correct calculation formula is:
(N - 1) * 4 + 1024 * N
Type N to want, the size of the unit of GB, the final results units for MB. Want to tell 2 GB partition, for example, the formula is:
(2-1) * 4 + 1024 * 2 = 2052 MB.
So I can tell the size of an integer division