In the following tests, we checked the DVD reading capabilities of the Memorex 16X drive with scratched / defective DVD media. For our 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 varying in dimensions from 0.4 to 3.0 mm.
The following transfer rate picture comes from the CDVD Benchmark v1.21 transfer rate test.
A lot of fluctuations with this test disc. Fortunately, the test finished successfully and no error 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, the only difference being that there are no scratches on it. Instead, there are defective areas, ranging in dimensions from 0.5 to 1.1 mm.
There are also fingerprints sized between 65 and 75 micrometers.
Near perfect performance achieved with this disc.
- Dual Layer media
This is an 8.5GB dual layer single sided DVD-ROM disc with artificial scratches ranging dimensionally from 0.4 to 3.0mm, on both layers.
The Memorex 16X, performed excellently with the specific test disc. Artificial scratches, ranging in dimensions from 0.4 to 3.0mm are not a problem for the drive.
The disc is a single sided, dual layer DVD-ROM disc of a 8.5GB capacity. The only difference between the TDR-845 and the TDR-841 is that the former 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 micro meters.
Smooth reading speed indicating excellent performance. Again, no errors were reported.
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 was designed to inspect and adjust DVD-VIDEO players. The disc checks the layer switch operation
from layer 0 to layer 1 and also includes test pictures and test signals on
DVD sound files.
The current TDV-541 also checks the error correcting capabilities of
the drive. It also includes scratches from 0.4 to 3.0 mm.
Untidy speed graph, but the procedure finished successfully.
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 has also 65 - 75 micro meter fingerprints.
Excellent reading from the Memorex drive. The artificially embedded dots and fingerprints were not a problem for the drive's error correction mechanism.
The Memorex, being equipped with a NEC chipset, has a very good error correction mechanism and managed to read all of our discs successfully, without errors. However, we weren't satisfied from its performance with the ABEX TDR-821 and TDV-541 test discs.