Different format of ROM has different client data in each sector. For instance:
CD type |
User data on sector (bytes) |
CD-DA |
2352 |
CD-ROM |
2048 |
VIDEO CD |
2336 |
CD type |
User data on sector (bytes) |
CD-DA |
2352 |
CD-ROM |
2048 |
VIDEO CD |
2336 |