硬盤分區(qū)取整公式 取整算法（Hard disk partition the integer rounding formula）

1、硬盤分區(qū)取整公式 取整算法（Hard disk partition the integer rounding formula）Hard disk partition tips - integer partitionWhen will we partition the input numbers, such as you want to get a 2G partition you may enter the 2000M or 2048M in these numbers you enter these areas under Windows will not be recognized as

2、integer 2G, but 1.9? G, want to get under the Windows integer G partition, you must know a formula, through this formula to calculate the value Windows is being recognized as integer values of G.Formula: integer G (x-1) *4+1024*X=Y(Note: the above * represents X, the same below)Where X is an integer

3、 partition you want to get the value of the unit is G, Y is your mobile hard disk partition software partition should be the number of input units is M, for example, I want to get a 3G integer space Windows, then I should input partitions (3-1) *41024*3 = 3080, then we should be in the district when

4、 the input of the 3080 as the size of the partition, similarly to the separation of 10G space should be *41024*10 (10-1) = 10276, 10276 will be the input integer space 10G, we can calculate the size of other!Cases:(10-1) *4+1024*10=10276 10G(5-1) *4+1024*5=5136 5G(151) *4+1024*15=15416 15G(201) *4+1

5、024*20=20556 20GNitrile nitrile nitrile nitrile we in to the hard disk partition, the partition size is based on the general 1024M=1G set, but an integer points out that the partition size is often not what we want. For example, we want to C drive into 10G, so how to fill the mobile hard disk partit

6、ion size: 10240M. but after the partition display is 9.XXG. what is the reason?The reason is that we have the formula: not simply press 1024=1G to set the correct formula is: (N-1) *4+1024*N where N is the size you want, GB, the final results for the MB. unit for example want to give 2GB partition,

7、then the formula is: (2-1) * 4+1024*2=2052MB., now you can tell the size of an integer partition. What is a partition? Partition in essence is a kind of hard disk format. When we create a partition, has already set the mobile hard disk partition physical parameters of hard disk, the hard disk master

8、 boot record (Master Boot Record, designated generally referred to as the MBR) and boot record backup storage location. The need for a file system and other operating system management information on the hard disk is formatted after the adoption of high-level, that is to achieve the Format command.

9、Before the installation of the operating system and software, first of all need to partition and format the hard disk, and then to use the hard drive to store all kinds of information. Many people would think that since it is hard it must divide into several parts, in fact we can only create a mobil

10、e hard disk partition to use all or part of the hard disk space. However, no matter how much we are divided into districts, either using a SCSI or IDE hard disk drives, hard drives must be the primary partition to set active partition, so that we can start the system through the hard disk. Two, exte

11、nded partitions and logical partitions: DOS and FAT file system was initially designed to support the establishment of up to 24 partitions on a hard disk, respectively, from C to Z 24 drive letter. But the master boot record partition table can contain at most 4 partitions record mobile hard disk pa

12、rtition software, in order to effectively solve this problem, partition of the DOS FDISK command allows the user to create an extended partition, and inherent in the extended dos partition create up to 23 logical partitions, each partition which are individually assigned a letter, can is independent

13、 of the use of computer as a physical device. A logical partition information have been preserved in the expansion zone, while the primary and extended partitions information stored in the hard disk in MBR. This means that regardless of the number of hard drives,The master boot record contains only

14、the primary partition (that is, how will open mobile hard disk partition move partition) and extended partition two partition information. Three. Format: 1 FAT16 on the computer, the old bird, on the hard disk partition format is the most familiar, we are in this area understand format and the thres

15、hold into the computer. It uses 16 bit file allocation table, the maximum partition can support 2GB, is currently the most widely used and operating system supports up to a disk partition format, almost all of the operating system can support this kind of format, from DOS, win 3.x, win 95, win 97 to

16、 win 98, Windows NT, win, 2000/XP, and even hot moment Linux support this partition format. But the mobile hard disk partition is FAT16 format partitions are one of the biggest drawback is that the hard disk, the actual efficiency is low. Because the dos and windows system, disk file allocation is i

17、n cluster unit, a cluster is assigned to a file using this file, regardless of the number of occupied capacity of the entire cluster. And the size of each cluster from the hard disk partition to determine the size of the partition, the greater the greater the cluster. For example, if the 1GB hard di

18、sk only a region, then the cluster size is 32KB, that is to say, even if a file is only 1 bytes long, storage also accounted for 32KB of hard disk space, free mobile hard disk partition software among all the remaining idle there, this leads to the great waste of disk space. FAT16 supports more disk

19、 partitions, each cluster capacity is large, the waste caused by the greater. So with the current mainstream hard drive capacity is more and more big, the disadvantages become more and more prominent. In order to overcome the weakness of FAT16, the Microsoft Corp launched a new disk partition format

20、 in the FAT32 win 97 operating system. 2, FAT32 this format uses 32 bit file allocation table, the management of the disk capacity greatly enhanced, breaking the FAT16 for each partition to give mobile hard disk partition is only 2GB, the use of FAT32 partition format, the user can be a large hard d

21、isk is defined as a partition. Without into several partitions to use, greatly facilitate the management of hard disk. Moreover, FAT32 also has one of the biggest advantage is: in a less than 8GB partition, each cluster has a fixed capacity FAT32 partition format is 4KB, compared with FAT16, can gre

22、atly reduce the waste of hard drive space, improve the utilization efficiency of hard disk. At present, the operating system supports the disk partition format is win 97, win 98 and win 2000/XP. However, the lack of mobile hard disk partition format has its partition, the first is the disk partition

23、 with FAT32 format, due to the expansion of the file allocation table, the running speed is slower than the FAT16 format hard disk partition; in addition, because of the DOS system and some early application software does not support this partition format, so using this partition format, you cannot

24、use the DOS operating system and some of the old old application software. 3, NTFS NTFS partition format is general computer users feel strange, it is a network operating system Windows NT hard disk partition format, use the Windows NT users must deal with this partition format. The significant adva

25、ntages of mobile hard disk partition is security and stability is extremely good, not easy to produce pieces of files in use, operating speed is good space utilization and the software on the hard disk. It can record the users operation, through very strict restrictions on user permissions, so that

26、each user can only operate the permissions granted by the system, the full protection of the network system and data security. However, much current operating system support this partition format, in addition to Windows NT, just listed win 2000 also supports this hard disk partition format. But with

27、 the Windows NT mobile hard disk partition is the same to win 2000, using NTFS 5 partition format. Disk quota - you can limit the disk disk space users can use the new features of NTFS 5;Encryption - from the disk read and write documents, can automatically encrypt and decrypt data files etc. With t

28、he popularity of win 2000, the majority of computer users will become familiar with the format of this district. 4, the Linux Linux operating system is the last it media is the most popular operating system. Because the system is * * * software, almost no money can be put into the computer, has won

29、many users. The disk partition format and mobile hard disk partition to his operating system is completely different, there are two kinds of forms: one is the Linux native primary partition, a swap partition is linux. Excellent safety and stability of the two partition format, combined with the Linu

30、x operating system after the crash, the opportunity is greatly reduced, can let us get rid of windows often collapse of the nightmare. However, the operating system currently supports this partition format only Linux, not interested in the Linux system the user can only feel powerless and frustrated

31、. Through the introduction above, I think you must have the common understanding of the hard disk partition format. Then, the operating system quickly according to what you need to install mobile hard disk partition installed, determine the partition format to your hard disk. Hard disk partition mus

32、t go through in order to use the disk after partition, the next step is to format the hard disk (FORMAT) work, the hard disk must be formatted to use. The format is the establishment of tracks and sectors on the disk, after the establishment of good tracks and sectors, computer can use the disk to s

33、tore data. In the Windows and DOS operating system, have the format Format program, however, once the hard disk, hard disk data but will all not to see how the mobile hard disk partition! So this action before, first determine whether the data in the disk and, if it is to be backed up. 5.exFAT fonte

34、xFAT (Extended File Allocation Table File System, extended FAT, extended file allocation table) is Microsoft in Windows Embeded 6 (including Windows CE 6, Windows Mobile) which is suitable for flash file system introduced. For flash memory, NTFS file system is too complicated, and is more suitable f

35、or exFAT. Relative to the FAT file system, exFAT has the following advantages: enhanced interoperability, single file size up to 16EB desktop computer and mobile devices (230584300921369395 bytes, 16M TB, 1TB=1024G) and the cluster size can be as high as 32MB, with the remaining space allocation tab

36、le, the remaining space allocated to the mobile hard disk partition performance the maximum file modifications, the same directory number up to 65536, to support access control to support TFAT the file system does not support Windows Vista ReadyBoost flash drive. Windows Vista SP1 supports the file

37、system. Please note: exFAT is a compromise, only for the U disk and. /font font class= Apple-style-span style= font-weight: bold; id= bks_cf464ay1 requires strict attention is that this division is only supported on Vista, other systems can not be used, XP can support this format by replacing the dr

38、iver file, but can only read and write, not a format /font I added: the whole G integer partition method (from 1g to 200g the most accurate integer partitions) (turn) integer partitions the general algorithm of mobile hard disk partition tool is M= (G-1) X4+1024*G, M partitions the input size. For e

39、xample, we need to partition for 10G, then X4+1024X10 (10-1), the result is 10276M, but this algorithm is not accurate. The hard disk usually has 255 heads, 63 sectors (here to be research, generally not so much head, but behind the result is correct), so each cylinder size: 512byte x 255 x 63 = 822

40、5280bytes = 7.84423828125 M to 4G, then to 4 * 1024M=4096M to the number of cylinders is 4096 / 7.84423828125=522.166 integer both for 523 cylinders should be M = 523 * 7.84423828125=4102.53662109375M or decimal point behind some in 1, which is 4103M, windows is considered to be 4.00G. (where there

41、is doubt, why 4103M windows is identified as G NTFS and general FAT32) this method. From 1g to 200g the most accurate integer points how to mobile hard disk partition 1G: 1028M 2G: 2056M 3G: 3075M 4G: 4103M 5G: 5123M 6G: 6150M 7G: 7170M 8G: 8198M 9G: 9217M 10G: 10245M 15G: 15367M 20G: 20482M 25G: 25

42、604M 30G: 30726M 35G: 35841M 40G: 40963M 45G 46085M: 50G: 51208M 55G: 56322M 60G: 61444M 65G: 66567M 70G: 71681M 75G: 76803M 80G: 81926M 85G: 87048M 90G: 92162M 95G: 97285M 100G: 102407M 110G: 112644M 120G: 122888M 130G: 133125M 140G: 143362M 150G: 153606M 160G: 163843M 170G: 174088M 180G: 184324M 1

43、90G: 194561M: 200G although 204806M turn the article, but I still dont understand what the principle of the hard disk partition is what? as a partition number is rounded to cylindrical (partition by fan, according to the column by advance, because the disk read and write the actual work this way), a

44、 cylindrical storage size = sector number * * head sector size; for example, C to G, according to the store the calculated amount of cylindrical non integral cylinders, such as 100.5, the partition, the actual number of C accounted for the number of cylinders, 101? Still accounted for 100.5, the 101

45、 cylinder behind the extra storage space to mobile hard disk partition to a disk? If the actual number is rounded column, the size will be more than the original C G, the windows and how to identify for the whole G? Input when partitioning the size and windows size as recognition principle? The answ

46、er is negative, that is what principle? Hard disk partition is based on the column, or the whole, or the whole sector? As a good C regardless of whether the whole G, it is the whole column or the whole track or the whole sector 1 after the hard disk partition, will form the 3 forms of the state; tha

47、t the primary partition, partition and non DOS mobile hard disk partition tool area. In the hard disk in the non DOS partition (Non-DOS Partition) is a special form of the partition, it is a hard disk in the region separated for separate use another operating system, the main operating system partit

48、ion, is a piece of storage space is divided. Only the non operating system to manage and use the DOS partition in the storage area outside the system, non DOS partition of the partition in general cannot access data. Primary partition is a relatively simple partition, usually at the top of a hard di

49、sk area, constitutes a logical disk mobile hard disk partition C. The master boot program which is a part of it, this procedure is mainly used to detect the correctness of the hard disk partition, and to determine the active partition, responsible for the right to guide the transfer of the active pa

50、rtition to the DOS or other operating system. This procedure will not be able to damage from the hard disk boot, but from the soft zone or region of the hard disk read and write. The concept of the extended partition is more complex, extremely easy to cause the hard disk partitions and logical confu

51、sion; the partition table is fourth bytes for the partition type value, basic mobile hard disk partition DOS normal bootable partition is greater than the 32MB value is 06, the extended DOS partition value is 05. If the basic DOS partition type to 05 can not start the system, and can not read and wr

52、ite the data. If the 06 change does not recognize the type of DOS such as EFH, DOS that is not a DOS partition to partition, of course, can not read and write. Many people use this type of value to achieve a single partition encryption technology to restore the original value of the correct type so that the district can be restored to normal.Statement hard integer partition methods: algorithm partition size = (partition size -1) * * 41024 partition sizeIf the hard disk partition of integer G formu