Method and system for managing optical storage medium file system structures

A method for storing information on an optical storage medium, the method comprising:

• storing information on the optical storage medium in data units;
• generating updates to the information stored on the optical storage medium, the updates altering some but not all data units;
• determining one or more data units altered by the updates to the information and one or more data units unaltered by the updates to the information;
• and
• storing the updates to the information on the optical storage medium by writing the altered data units to the optical storage medium and leaving the unaltered data units on the optical storage medium.

A method for updating the file structure of a re-writable optical storage medium, the method comprising:

• sending updated file structure information from a host to an optical drive;
• reading the file structure information stored on the re-writable optical storage medium;
• comparing data units of the updated file structure information with data units of the file structure information stored on the re-writable optical storage medium to identify data units changed by the updated file structure;
• and
• updating the re-writable optical storage medium with the updated file structure information by writing substantially only the identified file structure data units to the re-writable optical storage medium.