So in Dos3.0, Microsoft released new file system Fat16. In the use of Dos2.0, the management capability of larger disk is demanded. If there are 100 these kinds of little files in your disk, the disk space you waste varies from 700KB ( sector of 511MB) to 3.1MB ( sector of 2047MB). The sizes of the current popular HTML file are 1KB or 2KB, and dozens of HTML files are used in the establishment of one website. For example, if a 1KB file is set in a 1000MB sector, the space it takes up is not 1KB, but 16KB, so 15KB is wasted. (2)The usage of cluster is not appropriate.
And the capacity of partition disk is related to cluster, which exerts a tremendous influence. FAT16 file system can not fit the large capacity hard disk, so it has to be divided into several disk spaces. And 3.2 GB, 4.3GB and larger hard disk can be found everywhere. If you want to buy a new computer, its hard disc capacity must be 2GB at least. (1)Disk partition capacity is 2GB at most. Then can the left space of that cluster be used? No! Therefore, when the disk is used, the more or less space will be lost.īy that on, FAT16 has two big weaknesses: But if the file is 1KB, it also takes up one cluster. If users want to store a 50KB file in a 1000MB sector, you will use 4 clusters because the capacity of one cluster is 16KB. The relationship between capacities of sector and cluster in FAT 16 are following: Every file must be allocated enough cluster, then it can be stored on the disk. Cluster is the allocation unit of disk space, just as a grid of bookshelf in library. Because of the innate limitation, when it exceeds the regular capacity of the sector, the number of the cluster must be expanded to adapt to larger disk space.
The configuration files of every sector are expressed by 16 bytes in FAT16 and this is why it is named FAT16. The most file system we contact is FAT16 and FAT32. And MS-DOS 7.10 and ROM-DOS 7.10 both provide FAT16 and FAT32 for users.
#DISK UTILITY FOR MAC FAT16 WINDOWS#
In the operating system of personal computer, FAT16 is used in MS-DOS and low-level version HPFS is used in OS/2 and NTFS is used in Windows NT. If FAT is lost, the data on the hard disk can not be used because it is unable to be located.įile system of different operating systems are different. It is very important for the use of the hard disk. Just as its name implies, it is a table marking the position of files. FAT is abbreviation of File Allocation Table. Before introducing FAT16 file system, users must know what FAT is.
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