Week 6 - Example File Systems Flashcards
What does FAT stand for?
File Allocation Table.
What is FAT supported on?
DOS Windows Unix Digital Cameras Game Consoles Mobile Phones USB Keys
What is the size limit of FAT12?
32 MB
What is FAT12 used on?
Floppy Disks
What are the main versions of FAT?
FAT12
FAT16
FAT32
What is the most common version of FAT?
FAT32
What is the size limit of FAT16?
2 GB
What is the size limit of FAT32?
2 TB
What is the max file size of a file on FAT32?
4 GB
What are the 3 physical sections of a FAT file system?
Reserved area
FAT area
Data area
What is the Reserved area use for?
For general file system information
What is the FAT area use for?
For primary and backup FAT structures
What is the Data area use for?
Used for storing actual file and directory content. The Data area is made of clusters. This is the main area of a FAT system.
What type of address is used for the reserved and FAT areas?
Sector addresses
What type of address is used in the data area?
Cluster addresses
What number do Cluster addresses start from?
2
What is the typical range of size for a Cluster?
1 Sector (512 bytes) to 128 Sector (62 KB)
What is the first sector of a FAT file system used for?
Used as a Boot sector, to store boot code (Used in the boot process) and information about the file system.
How do you calculate the size of the Data area?
Subtract the starting address of the data area from the total number of sectors in the file system.
What are the first coupl of sectors in the Data area reserved for in FAT12 and FAT16?
The Root Directory.
How do you find the root directory in FAT32 Data areas?
The address of the root directory is given in the boot sector. This means the Root directory can be anywhere in the Data area.
How many entries do you ave in the FAT table?
As many entries as the number of Clusters.
