Cloud Computing Learning Route course syllabus Courseware: FAT File system

Microsoft uses a total of six different file systems in the Dos/Windows family of operating systems (including Winfs, which will be used in the next version of windows). They are: FAt12, FAT16, FAT32, NTFS, NTFS5.0 and WINFS. Let's introduce their related features and rules one by one. FAt12, FAT16, and FAT32 are all Fat file systems. It's short for File Allocation Table. The oldest file system, FAT12:

This is the "old" file system that accompanied the birth of Dos. It uses a 12-bit file allocation table, hence its name. Later FAT systems are named in this way. Used before DOS3.0. But right now, we can all find this file system: for floppy drives. Of course, it is true that this file system is basically not used elsewhere. The disk capacity that Fat12 can manage is 8m. At that time, in the absence of a hard disk, the disk management capability was very large.

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FAT file system

The FTA file system does not have inode, so FAT does not read out all the block of the file at the beginning. Each block number is recorded in the previous block

If the block written by a file is too scattered, the read speed is very slow. Scattered block can be put together as much as possible by defragmentation.

Create a file system vfat

[root@tianyun ~] # mkfs.vfat / dev/vda6