CDR Tests - Page 2

- Writing Quality tests:

We used Ricoh's 74min 24x CD-R media. All CDs were burned with Nero 5.5.4.9 and were Audio CDs with 74:51:27 in size. The produced CDs, were measured from DigitalDrives and results are illustrated in the following tables:

*note: results for LiteOn, Plextor and Sanyo drives are not with the latest firmware due to lack of test media :(

The AOpen CRW2440A performed very well with Ricoh's 24x CD-R media. With JustSpeed On the drive needed 272secs to end the task, which is 5secs slower than PleXWriter PX-W2410A, but on the other hand it has better writing quality with 1.6 average C1 errors. When JustSpeed is disabled, the drive has 1.7 average C1 errors, which also are lower than what the PleXWriter drive achieves. We also used Mitsubishi Chemicals 74min/80min CDs and we got similar results with the Ricoh 74min 24x CD-R media :-)

When JustSpeed is disabled, high C1 errors are produced during 28-31minutes. This is also noted at the 24x writing speed. At the end of the disc C1 errors are also increased.

When JustSpeed is enabled, the drive behaves very well in almost all of the burning time. There are some peaks, at 24mins, but they are not worrying.

*note: results for LiteOn, Plextor and Sanyo drives are not with the latest firmware due to lack of test media :(

At the 24x Zone-CLV writing method, JustSpeed system seemed to work very good and produced the same C1 error rate at the 20x writing speed. When JustSpeed is enabled the drive managed to write even less errors, 1.30 average C1, outperforming the competition. The burning time is 6-7 longer than with the PleXWriter PX-W2410A. We had similar results for the AOpen CRW2440 with Mitsubishi Chemicals 74min 24x CD-R media.

The drive continues to show an unpleasant behaviour when JustSpeed is disabled. The peak between 34 and 37mins is something that should puzzle AOpen engineers.

With JustSpeed enabled, the drive has a smooth operation. The C1 errors in the shift points are low and seem to increase at the end of the disc.

- Overburning Tests:
The AOpen CRW2440 supports overburning up to 99minutes!

- CD-Text Results:
We created several AudioCDs with CD-Text enabled. The AOpen can write/read CD-Text Audio CDs.

- CloneCD Tests:
The CloneCD v3.0.9.1 reports that the drive supports the DAO-RAW writing feature. The drive also supports JustLink. From our tests results DAO-RAW writing works without any problem for the SafeDisc 1, LaserLock 1/2 and SecuROM 2 protections.

- SD2 Support:
For the SD2 tests we used the "No One Lives For Ever" and "Emperor Battle for Dune" CD titles. We used the AOpen CRW2440 both as reader/writer. The produced backup didn't work using the same or any drive we tested with. Therefore, the AOpen CRW2440 cannot produce SD2 working backups.

- 8cm mini CDs:
The AOpen does support 8cm CDs and/or business cards. We did try several burns with business cards and 8cm CDs without any problems.

- Buffer Underrun tests:
The AOpen CRW2440 supports "JustLink" anti-buffer underrun technology. That ensures no buffer underruns will happen as long as it is activated. From our tests, the drive worked without any problems when we attempted to cause buffer underruns by pressing ctrl+shift+del several times.