Advanced tests:

Sheep Test

For this test, we will use the Sheep tests made by Alexander Noé. Why is it called sheep test? That’s because the logo of the first 1 to 1 copy program called CloneCD is a sheep. When looking at supported writers, you will notice that the feature list has sheep to indicate if a feature is supported or not. In this case we are interested in the writer’s ability to backup/write weak sectors. Also called: “Correct EFM encoding of regular bit-patterns”.

No sheep: Can’t backup any Safedisc 2 versions without the help of software tricks

1 Sheep: Can backup Safedisc 2 up to version 2.4x without software tricks

2 Sheep: Can backup Safedisc 2, including version 2.5x

3 Sheep: Can write all possible weak sectors, few if any writers could do this.

One of our forum moderators Womble; has written a guide concerning the “Sheep Test” that can be and be found here.

In the screenshot below taken from CloneCD, we see the Lite-On LH-20A1H supports everything.

The Lite-On LH-20A1H supports DAO-RAW96 recording mode, which basically means, it can write uncorrected data and sub-channel data.

As we can see from the table and screenshots, the Lite-On LH-20A1H is a “Two Sheep Burner”. It also succeeded in writing the Safedisc V2.90 test but failed the Sheep3 test.

Overburning

900MB (99 minute) over-burn test:

To test the overburning capabilities of the Lite-On LH-20A1H, we used the over-burning test in Nero CD/DVD-Speed. We used an Infiniti Professional Compax 99min/900mb CD-R. (Thanks to Medea International (UK) for providing the disc).

From the screenshot above, we can see that the Lite-On LH-20A1H would be able to write the 99 minute media at its full length.

To test if the Lite-On LH20A1H is capable to read overburned CD-Rs, we have set up a compilation in Nero and burned the disc, which has been tested above, to 99:57:74 and tried to read back the disc:

We read the disc back in CD-Speed at full speed. As we can see above, the Lite-On LH-20A1H had no problems in reading the disc to the end, with an impressive maximum read speed of 53.26x.

DVD+R overburning:

First we tried to overburn a DVD+R disc:

As we can see above the Lite-On LH-20A1H does not support overburning on DVD+R media.

DVD-R overburning:

Now we try a DVD-R:

As expected, the drive does also not support overburning on this media type.

This concludes our Lite-On LH20A1H review. To read the conclusion, click on the link below....

LightScribe:

Conclusion