Thanks for the compliment With Ahead’s InCD (packet writing) we got a free useable disc space of about 580MB. This is about 30MB more than with Mt. Rainier. A 650MB CD-RW disc will have about 540MB of space with packet writing and 500MB with Mt. Rainier. We think (mind you: think) that this decrease in available space is because of Mt. Rainier’s ‘Defect Management’. See the picture on the first page for details. If so, the extra space is mostly a benefit, guaranteeing the disc will remain readable even when errors are present on the disc (scratches, smudges, etc), something that’s not possible with packet writing.