LiteOn Slimtype SDW-431SX - Page 11

DVD Recording Tests

- Writing Performance

The LiteOn Slimtype SDW-431S, is a dual writer so it supports both minus and plus formats. The supported speeds are 4X for +R and 2.4X for +RW media. On the minus format the supported speeds are slower at 2X for both writable and rewritable media.

4X DVD+R

The LiteOn supports 4x maximum DVD+R writing. The screenshot from NeroCDSpeed shows that the writing process started at 2.4x but after only few sectors(100MB) the speed was increased to 4x and that speed was kept constant until the end of the process.

2.4X DVD+RW

For the plus rewritable media the supported speed is 2.4x. The drive wrote the disc under CLV with average writing speed 2.47x.

2X DVD-R/-RW

The supported speed for both writable and rewritable minus media is 2X and the drive writes both disc under the same strategy.

- Burning Tests

The following graphs show the maximum writing speed of the three devices with all available DVD writable and rewritable media.

The LiteOn supports 4X for plus writable media and therefore needed about 14:50 minutes to finish the writing task with the +R disc, while with supported speed at 2.4X for the +RW format, the writing process finished after about 22:30minutes. With the minus format, the LiteOn and Pioneer external writers finished each task at almost the same time while Freecom was faster at 4X with writable discs. The LiteOn returned acceptable times with all four tested media.

• CMC 4x DVD+R

• TraxData 2x DVD-R

• MKM 2.4x DVD+RW

• Maxell 4x DVD-RW

Since the external LiteOn drive does not support the current fastest DVD writing speeds, it had problems with specific media certified for writing at 8X. Despite this, the LiteOn recognized and wrote most tested media at the appropriate supported speed.