LiteOn DVD+RW LDW401S - Page 10

DVD Recording Tests

- Writing Performance

LiteOn supports DVD+R and DVD+RW writing. The maximum supported speeds is 4X for both formats.

The following pictures come from Nero CDspeed writing simulation test. The first one shows the writing behavior of LiteOn with a 4x Ricoh DVD+R and 4x DVD+RW media.

According to CDSpeed, the drive uses the 4x CLV writing strategy for the DVD+R/+RW formats. Note that the drive recorded at 4x only with Ricoh DVD+RW media.

• DVD+R

• DVD+RW

We burned a 4315MB DVD-Video on 4x DVD+R, 2.4x DVD+RW and 4x DVD+RW media by Mitsubishi Chemicals, Taiyo Yuden, Verbatim, Maxell, Ricoh and Sentinel. The following table illustrates the various media information along with the recording times at the the maximum allowed speed.

The drive gave the expected recording times for 4x. The drive recorded at 4x with all of the DVD+R media we tested, including the Maxell 2.4x. In the next page we will see whether this affected the writing quality.

For 4x DVD+RW we only used media by Ricoh, since the availability of such discs is limited to very few manufacturers.

- DVD+RW Packet Writing Tests

On this test we used the same 412MB file just like the CD-R test. The tested media was a Ricoh 4X DVD+RW. The reading / writing speeds reported below were measured while the DVD+RW background formatting was in progress.

Although the LiteOn drive support writing speed 4x for the DVD+RW media the average reading and writing speed under packet writing is lower in comparison to a normal read or write process. This can be explained by the fact that the background formatting process was running in parallel with our tests.