TEAC DV-W512G Dual DVD±RW Recorder - Page 4
DVD Error Correction
In the following tests we examined the DVD reading capabilities of
the drive with scratched / defectivee
For the tests we used CDVD Benchmark and Nero CDSpeed. The reference test
- 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
The TEAC DV-W512G read the disc at 12X P-CAV and the scratched area did
not affect the process. The disc was read accurately and no read errors
This is also a single sided, single layer DVD-ROM of a 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 only defectivee areas
of dimensions ranging from 0.5 to 1.1 mm.
There are also fingerprints sized between 65 and
As before, the disc was read without any "read errors" and the
test was finished successfully.
- Dual Layer media
This is a 8.5GB dual layer, single sided DVD-ROM disc with artificial scratches
of dimensions ranging from 0.4 to 3.0mm, on both layers.
The drive read both layers without any major problem, as the above graph shows.
The disc is a single sided, dual layer DVD-ROM disc of 8.5 GB capacity.
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.
drive passed the fingerprint defective area without any reading speed drop
and finishes the test without problems.
TDV-541 is a single sided, dual layer DVD-VIDEO disc, with a capacity of 8.5GB.
The disc is based on 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 reading process started at 3.41X and reached 8.015X at the 4.0GB point,
where the drive changed layer and started reducing its reading speed up until
the end. There are some minor glitches at the start of the second layer
indicative of any serious reading problems and the drive finished the reading
process without problems.
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
Black dots and fingerprints on the disc's surface did not create any reading
problems, and the drive finished the task successfully.