Aopen vs Toshiba - Page 5

DVD Error Correction Tests

In the following tests we examine the DVD reading capabilities of the drives with scratched / defective DVD media. For the tests we used CDVD Benchmark and Nero CDSpeed. The reference test media came from ALMEDIO.

- Single Layer media

ABEX TDR-821

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 rate test.

The performance is similar for both drives, although the AOpen drive exhibited more speed fluctuations, especially towards the end of the disk. Generally good behavior though.

ABEX TDR-825

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 speed fluctuations at the end of the reading process make their presence, especially for the AOpen reader. No errors reported.

- Dual Layer media

ABEX TDR-841

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 AOpen drive read the specific disc easily, as seen by the smooth graph, while the Toshiba dropped speed just after the scratches in the first layer.

ABEX TDR-845

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.

Excellent performance for the AOpen reader. In the case of the Toshiba, the reported error can not be ignored.

ABEX TDV-541

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.

AOpen DVD1648/AAP PRO

Toshiba SD-M1912

The reading process finished successfully only for the Toshiba drive, with a smooth reading graph. The AOpen managed to read only the first layer. Then the process stopped due to uncorrectable errors.

ABEX TDV-545

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 disc's surface, sized from 0.4 to 1.0 mm. It also has 65 - 75 micrometer thickness, fingerprints.

AOpen DVD1648/AAP PRO

Toshiba SD-M1912

Black dots and fingerprints on the disc's surface did not create any reading problems. There was a slight glitch during the layer change for the AOpen but both drives finished the task successfully.