In the following tests, we examine the DVD reading capabilities of
the LG GSA-2266D 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
Without errors or drops in speed and at a maximum reading speed of 8, the drive managed to read this SL test media all the way to the end.
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
Here too, this time with SL media, the drive again managed to read through to the end without error or any significant drops in speed (yellow dots).
- 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.
In this test, the drive read through both layers at a maximum reading speed of 8X. There were no errors or significant drops in speed.
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.
Very good performance.
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.
Even though CDSpeed reported some fluctuations in speed during the second layer, the drive managed to successfully complete the reading process in 19:06mins.
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
Smooth reading, no speed fluctuations whatsoever. Good performance.
In all cases, the maximum reading speed was 8X. The drive did not drop speed while reading over the defective areas with any of our test discs except for the 541 test disc, but it still managed to complete the test without errors. Overall, very good error correction capabilities. The only comment would be perhaps a faster reading speed.