Optorite DD1205 Dual DVD±RW Recorder - Page 4
DVD Error Correction
In the following tests we examined the DVD reading capabilities of
the 1205 drive with scratched / defective
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
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 defective areas of dimensions
ranging from 0.5 to 1.1 mm. There are also fingerprints sized between 65 and
The drive read the single layer test media without problems while no errors
were reported. The graph is clean indicating smooth, even reading.
- 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.
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
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.
Again, excellent performance...
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.
Although reading started normally, at around 2GB the drive needed to
slow down in order to read the contents of the disc on the defective areas.
no errors were reported and the task finished successfully.
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 disc surface, sized from 0.4 to 1.0 mm. It also has 65 - 75
Black dots and fingerprints on the disc's surface were not a
problem for the drive.
DVD error correction capabilities of the Optorite drive are