The overhead added by different recording systems seems to vary slightly. The same is true of 74 minute media. The author would like to thank all the media vendors for contributing media for this study and Kodak for loaning us a recorder. All disks exceed the guideline. 18 disks from vendor 4 exceed spec.
All disks meet guideline.
1.6 All disks meet guideline. 70 Very few disks exceed 70. Start Playable Diam. Max Info Diameter - Location of end of data area. Scanning velocity - Speed at which the track moves by the laser beam.