Media Info -

Writing - 18X (12.61X average) in 5:36 mins

As you can see in the CDSpeed writing graph, the drive decided to drop the burning speed just before it reached the maximum 18x, in order to finish the burning process.

Reading - 12X (9.35X average)

DaTARIUS Scans -

The Datarius system could not read the "suspicious" areas, where the burning speed dropped in the outer addresses (see CDSpeed writing strategy graph). POFs were reported at around 50mm radius (4.2GB address).

The DaTARIUS Analyzer couldn't read the disc at radius 51mm -55mm.