BD Write and ReWrite Tests - Nero CD Speed v4.7.7.16:
To test the BD writing performance of LG's new drive I used BD-R, BD-R DL and BD-RE media from MBI, TDK and Verbatim. To get the writing times, CD Speed's "Create Data Disc" feature was used. I also ran the discs through CD Speed's transfer rate test to make sure that the BP40NS20 could read them back.
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The BP40NS20 is capable of writing to BD-R and BD-R DL media at 6x. In both cases, the drive uses CAV to reach this speed.
| BD-R | BD-RE | BD-R DL | |
| LG BP40NS20 | 22:12 | 45:37 | 44:46 |
With a maximum BD-R writing speed of 6x, the BP40NS20 wasn't nearly as fast as some of the desktop Blu-ray Disc writers we've looked at recently. Nevertheless, the drive performed very well, taking a little more than 22 minutes to burn an entire 25GB disc. LG's new drive didn't disappoint when writing to BD-R DL media either. Thanks to its 6x writing speed, the BP40NS20 took less than 45 minutes to burn 50GB worth of data.
| Manufacturer ID | Max Write Speed |
Write Time | ||
| Moser Baer 25GB 6x BD-R | MBI R06 | 6x | 22:10 | Transfer Rate |
| TDK 25GB 6x BD-R | TDKBLDRBD | 6x | 22:12 | Transfer Rate |
| TDK 50GB 6x BD-R DL | TDKBLDRFD | 6x | 44:46 | Transfer Rate |
| TDK 50GB 2x BD-RE DL | TDKBLDWfa | 2x | 90:54 | Transfer Rate |
| Verbatim 25GB 6x BD-R LTH | VERBATIMw | 2x | 22:10 | Transfer Rate |
| Verbatim 25GB 2x BD-RE | VERBATIM0 | 2x | 45:37 | Transfer Rate |
The BP40NS20 completed our Blu-ray writing tests without any problems. The drive wrote to all of our test media at its rated speeds and, looking at the transfer rates, you can see that it had no problems reading the discs back.
Sadly, I was not able to test the BP40NS20 with any BDXL media. The discs are not available in the United States or Canada and importing them from Japan really isn't feasible as they cost anywhere from $30 to $90 each, depending on the type and capacity.
Performance Revisited:
Aside from some issues with Millenniata's M-DISC media, LG's new portable Blu-ray Disc writer performed as expected throughout most of our tests. The BP40NS20 turned in some relatively good times when writing to BD-R and BD-R DL media and was able to read Blu-ray Discs at speeds as high as 6x. The drive also did reasonably well in our CD and DVD read tests. While its seek times were a little higher than I would have liked, it read CD's at speeds as high at 24x and single layer DVD's at 8x. Writing CD's and DVD's wasn't a problem for the BP40NS20 either. For a portable drive, it turned in some respectable times and the writing quality was fairly good for the most part. With all of these things considered, the LG BP40NS20 gets a solid 8 out of 10 for its performance.
