detail information

Writing Data CD-R/RW discs:

The specifications state that the drive should be able to write CD-R/RWs at 24x:

CD-R:

The Plextor PX-608CU uses Z-CLV (Zone-Constant Linear Velocity) to write CD-R's at 24x. This gives an average writing speed of 16.27x and a writing time of 6 minutes and 10 seconds.

CD-RW:

The Plextor PX-608CU uses Z-CLV, (Zone-Constant Linear Velocity) to write CD-RWs at 24x. The average speed is 16.74x and total writing time is 6 minutes and 2 seconds

Write Quality:

We will test CD-R discs from different CD-R manufacturers. To really measure the write speed, we used the 'create data CD" function in Nero CD-Speed. The discs were written at the maximum speed that the drive supports. For the quality test, we used KProbe 2 which is a tool developed by a Lite-On employee. It runs under Windows and works with drives made by Lite-On. Also note that different drives and different reading speeds may affect the results obtained when scanning the discs. We used a Lite-On SOHR-5238S drive with firmware 4S09 and scanned the discs at 48X speed.

A written CD-R disc will always have some C1 errors; C1 errors are easily corrected by the drive's error correction capabilities. The next level of errors is C2, while C2 errors could also be corrected by most drive's error correction capabilities; they are not wanted on a good quality disc. A good disc should not contain any C2 errors, and preferably have an average C1 error amount of below 2.0 for the best discs, or at least below 10.0 averages for good quality discs. After C2 errors, there are only un-correctable errors that will make a disc unusable.

Below are the obtained results:

BenQ media with average C1 errors of 0.47 - it goes into the group 'best quality discs" category.

RICOH media - manufactured by Moser Baer India Limited and with its average of 0.82 it goes in the 'best quality" category.

Media made by Taiyo Yuden have always had a good reputation and with the average C1 errors of 0.21 it goes into the group 'best quality discs" category.

Ultron media and with the average C1 errors of 0.78 it goes into the group 'best quality discs" category.

Verbatim - a well-known brand showed us a C1 average of 0.35 - it goes into the category 'Best Discs".

Writing Quality with Re-Writable discs:

We will also test CD-RW discs from different CD-RW manufacturers. Settings and testing procedures is the same as used earlier in this review, so you may want to go back and read them if you are unsure. All discs used for these tests have been written to before, but none have been written to more than 5 times.

CD-ReWritable media:

Traxdata 74 min media made by Plasmon Data Systems Ltd, the quality is good for this CD-RW media.

Incredible low C1 errors on this Verbatim 24x CD-RW media.

Summary:
The CD-R writing quality is excellent, and the CD-RW quality is good/excellent.

So let us head on to next page and read about DVD-Writing performance…