In the following tests, we examine the DVD reading capabilities of
the LiteOn SOHW-1693S 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 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 SOHW-1693S managed to read this defective disc, producing an almost perfect graph, passing smoothly over the defective area and finishing the test without any errors or drops in speed, even towards the completion of the test where the speed reached 16X.
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
In this case we have a good graph, with the exception of the drop in speed at the start of the fingerprints area. There were also a few problems over the last part of the fingerprints area but nothing major. Other than that, the test ended successfully without errors.
- 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.
Great performance here, as the graph shows. Without any errors, the drive managed to successfully read all the defective areas on both layers.
This test 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 discs is
that the first includes
defective areas and fingerprints. The dimensions of the defective areas ranges
from 0.5 to 1.1 mm and the fingerprints are sized from 65 to 75 micrometers.
Again a very good graph indicating very good error correction capacities for the LiteOn 1693S drive. Again we have the slight drops in speed in both layers, just at the start of the fingerprints area.
The 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.
With a slight drop in speed just before and just after the layer change, the SOHW-1693S managed to read almost perfectly this test disc.
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
All the above tests, indicate a good error correction mechanism for the DVD error correction capabilities of the drive. Now let's move on to the protected games ripping and the rest of the review...