Fault Tolerance in a FAT File SystemThe FAT file system is used to access formatted disks in DOS-based systems, Windows operating systems, and several other operating systems. Because of its large installed base, the FAT file system is considered a de-facto file system standard. This high level of acceptance also makes the FAT file system attractive for portable applications that may need to exchange information with PC systems. However, the FAT file system was designed for PC applications. Consequently, several issues, such as fault tolerance, data structure overhead, and expandability were not considered during its design. Also, the addition of new features is limited by the need to provide backward compatibility. Probably the most significant shortcoming of the FAT file system is its lack of fault tolerance, and several books have been written on this subject.
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