I recently purchased a PX-716UF (TLA #0202) that was flashed to 1.06 and is connected via USB2.

I’ve burnt 3 discs today and found that only 1 of the 3 discs produces a smooth read transfer rate graph.

All of the 3 discs seem to produce adequate SUM8, SUM1 and Beta/Jitter graphs.

Can anyone suggest why the read transfer rate graphs for 2 of the discs aren’t as smooth as the other? Could it be a problem with the drive’s reading ability?

The first block of 4 graphs is a TYG02 (DVD-R) burnt at 8x.

The second block of 4 graphs is another TYG02 burnt at 8x.

The third block of 4 graphs is a TDK TTH02 (DVD-R) burnt at 12x.

Any thoughts would be greatly appreciated.