+-----------------------+
                        |        CS 439         |
                        |  PROJECT 4: Filesys   |
                        |     CODE READING      |
                        +-----------------------+

1. What is the purpose of struct inode?
2. What is the purpose of inode_disk?  What size must it be?  Why?
3. What does bytes_to_sectors do? How and where is it used?
4. What does byte_to_sector do?  How and where is it used?
5. How do inode_read_at and inode_write_at work?
6. What is the difference between struct dir and struct dir_entry?  How is each
used?