In the following tests, we examine the DVD reading capabilities of the drive with
scratched / defective DVD media. For the tests, we used CDVD Benchmark
and Nero CDSpeed. The reference test media comes from ALMEDIO.
- Single Layer media
This is a single sided, single layer DVD-ROM with a 4.7GB capacity, and its surface has an artificial scratch of dimensions varying from 0.4 to 3.0 mm.
The following transfer rate picture comes from the CDVD Benchmark v1.21 transfer rate test.
The Sony DW-G120A drive managed to complete the error correction test without any major deviations in speed and no errors were reported.
This is also a single sided, single layer DVD-ROM of 4.7GB
capacity. The data structure of the disc is exactly the same as that of the
TDR-821, with the difference that there are no scratches on it but instead,
defective areas of dimensions ranging from 0.5 to 1.1 mm.
There are also fingerprints sized between 65 and 75 micrometers.
Once again, the reading speed increased linearly and without any errors. Very good reading, reaching a maximum of 16x.
- Dual Layer media
This is an 8.5GB dual layer, single sided DVD-ROM disc with artificial scratches of dimensions ranging from 0.4 to 3.0mm, on both layers.
No errors in this case either. The reading speed in this case only goes up to 8X, which is the maximum supported speed for DL media.
The disc is a single sided, dual layer DVD-ROM disc with a capacity of 8.5GB.
The only difference between the TDR-845 and the TDR-841 is that the first includes
defective areas and fingerprints.
The dimensions of the defective areas range from 0.5 to 1.1 mm and the fingerprints
are sized from 65 to 75 micrometers.
Once more, high reading speed was achieved, but there were short speed drops reported just before the start of the second defects area on both layers.
The TDV-541 is a single sided, dual layer DVD-VIDEO disc, with a capacity
of 8.5GB.The disc is based upon the TDV-540 series which is designed for inspection
and adjustment of DVD-VIDEO players. The disc checks the layer switch operation
from layer 0 to layer 1 and also includes test pictures and test signals for
DVD sound files.
The current TDV-541 also checks the error correcting capabilities of
the drive and includes scratches from 0.4 to 3.0 mm.
The drive managed to complete the reading of this media without errors.
The 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 micrometer fingerprints.
Once again, smooth reading.
Overall, good error correction mechanism, capable of reading all the defects, without any fluctuations in speed.