1. File-System Implementation
Michael Thomsen
Jim Ford-Fleming

2. File-System Structure
Cluster Access Table
Mounted Image
Cluster Status
512 Byte Cluster 1 … 2 … 3 … 4 … 5 … 6 … 7 … 8 … … …
With a fixed data cluster size of 512 bytes, we can apply the following formula, using the access table status locations, to determine the address of the cluster in the mounted image.
Address = n * 512

3. Cluster Structure 512 Byte Cluster Filename (12 Bytes) Data Section
* Each Cluster needs a pointer to the next since this is an Indexed File System
Pointer to Next Cluster
(20 Bytes)

4. Implemented Functions
Close Closes the specified file
Create File Creates a file
Delete Deletes a file
Find Free Cluster Finds the next free cluster
Mount Mounts an image
Open Opens the specified file
Read Reads a file
Unmount Unmounts the image
Write Writes to a cluster