DVD Read Performance
We used Nero DVDSpeed 0.53 and DVDTach 2.51 to test DVD read performance.
We had to scratch our heads over the performance of the Sony drive in Neros DVD transfer rate tests. The behavior of the Sony drive looks suspiciously like DMA wasnt operational, even though the Windows Device Manager reported the Sony drive running in DMA mode 2. So we dug out our old copy of DVD Tach 98, version 2.51.
The behavior of the Sony drive in DVDTach was essentially the same -- very little spread between the maximum and minimum transfer rates at both 32KB block size and 2KB block size. While the system is reporting DMA mode, perhaps the Sony isnt properly handling DMA transfers. At any rate, as a DVD player, the Pioneer moves data off the disk much faster than the Sony.