Q. What is File allocation table?
FAT maps the usage of data space of disk. It comprises information about space used by every individual file and unused disk space as well as space which is unusable because of defects in disk. Because FAT comprises essential information, two copies of FAT are stored on disk so that in case one gets damaged then the other can be used. A FAT entry can include any of the following:
- unused cluster
- reserved cluster
- unused cluster bad cluster
- next cluster number in the file
- last cluster in file