What follows is a quality check test, which reports the ability of the drive, while reading scratched/defective media.
For the tests we used CDVD Benchmark and Nero CDSpeed. The reference test
- Single Layer media
The following graphics plot comes from CDVD Benchmark v1.21 transfer
rate test, using a single sided, single layer DVD-ROM with 4.7GB capacity
with an artificial scratch emended on the disc ranging from 0.4 to 3.0 mm.
The Pioneer K14L proved more than capable of reading the artificially scratched
disc with a small drop in speed at the end of the defective area.
Similar to the TDR-821 the TDR-825 is a single sided, single layer DVD-ROM
of 4.7GB capacity. The difference between the two discs is that the later emulates
not a scratch but a group of defective areas with dimensions ranging from 0.5
to 1.1 mm and fingerprints sized about 65 to 75 micrometers.
In this case, the K14L progressed smoothly while reading over the first defective
area of the drive, but as it moved onto the second defect, the drive showed
an inability to overcome the fingerprints and generating an error
in the middle of the particular defect. Although it managed to complete the
test, a read error was reported.
- Dual Layer media
Let us see, how the drive does in reading an 8.5GB single sided, dual layer
DVD- ROM with artificial scratches of dimensions ranging from 0.4 to 3.0mm
on both layers.
Smooth reading in both layers, with slight fluctuations in speed over the
defective areas. Overall
a good performance.
Much like the TDR-841, the TDR-845, a single sided, dual layer DVD-ROM disc
with a capacity of 8.5GB differs from the first disc in the fingerprints contained
in both layers along with the scratched areas. The dimensions of the defective
areas range from 0.5 to 1.1 mm and the fingerprints are sized from 65 to 75
Once again, good reading from the Pioneer drive with the PTP DL
disc and two defects on both layers. Again, only slight fluctuations in
speed for each layer.
Using Nero CdSpeed we tested the drive with the TDV-541, a single sided,
dual layer DVD-VIDEO disc, with a capacity of 8.5GB. Based on the 540 series
for inspection and calibration of DVD-VIDEO players, the TDV-541 inspects the
layer switch operation and the error correction capabilities of the drive,
including scratches ranging from 0.4 to 3.0 mm.
The Pioneer performance is inadequate in this case, with good reading in
the first layer but a very large drop in speed just after the layer change
and continuing through the second layer.
TDV-545 disc is based on the TDV-540 series. It is a single sided, dual layer
DVD-VIDEO disc with a capacity of 8.5GB. The TDV-545 includes artificial black
dots on the data surface, sized from 0.4 to 1.0 mm. It also has 65 - 75
As with most drives with this disc, the Pioneer successfully read both
sides of the media test disc. Good reading.
In most cases the error correction was good.