Lite-On DH-4B1S 4x Blu-ray Disc Triple Writer

Nero CD Speed v4.7.7.16 - BD-ROM:

To test the DH-41BS's BD-ROM reading performance, I used the Blu-ray Disc version of The Fifth Element. This single layer disc is about 23GB in size.

	Lite-On DH-4B1S	LG GGW-H20L	LG GGW-H10N	Sony BWU-100A
Transfer Speed Average: Start: End:	3.02x 1.67x 3.99x	3.61x 2.01x 4.82x	3.05x 1.70x 4.07x	2.00x 2.00x 2.00x
Seek Times Random: 1/3: Full:	108ms 4ms 3ms	117ms 175ms 223ms	148ms 275ms 385ms	123ms 228ms 407ms
CPU Usage 1x: 2x: 4x: 8x:	2% 1% 3% 4%	0% 1% 1% 2%	0% 1% 2% 3%	0% 1% 2% 3%

The DH-4B1S performed relatively well when reading BD-ROM discs. While not as fast as the drives from LG, it reached a maximum transfer speed of 3.99x.

Lite-On's Blu-ray Disc writer had no problems playing back The Fifth Element and The Simpsons Movie using the bundled version of PowerDVD. Just keep in mind that if your monitor is connected to your video card using DVI or HDMI, both need to be HDCP compliant to play AACS protected titles. If not, you can still play them by switching the connection to VGA or using software like Slysoft's AnyDVD HD.

Nero CD Speed v4.7.7.16 - BD-R and BD-RE:

Next we'll look at the drive's BD-R and BD-RE reading performance. For this I created a few data discs using single layer BD-R and BD-RE media from Memorex and then ran our BD read tests with CD Speed.

Memorex BD-R

	Lite-On DH-4B1S	LG GGW-H20L	LG GGW-H10N	Sony BWU-100A
Transfer Speed Average: Start: End:	3.02x 1.71x 4.03x	4.55x 2.58x 6.04x	3.06x 1.75x 4.07x	2.00x 1.99x 2.00x
Seek Times Random: 1/3: Full:	109ms 4ms 3ms	121ms 167ms 217ms	206ms 317ms 441ms	101ms 215ms 390ms
CPU Usage 1x: 2x: 4x: 8x:	2% 1% 3% 5%	0% 0% 2% 2%	0% 1% 2% 3%	0% 1% 2% 4%

Memorex BD-RE

	Lite-On DH-4B1S	LG GGW-H20L	LG GGW-H10N	Sony BWU-100A
Transfer Speed Average: Start: End:	1.99x 1.96x 1.99x	2.30x 2.29x 2.30x	2.51x 1.43x 3.34x	2.00x 1.99x 2.00x
Seek Times Random: 1/3: Full:	111ms 10ms 10ms	150ms 263ms 766ms	223ms 330ms 441ms	101ms 219ms 391ms
CPU Usage 1x: 2x: 4x: 8x:	8% 9% 14% 24%	0% 1% 2% 2%	0% 1% 2% 3%	0% 1% 2% 4%

Lite-On's new drive had no problems reading BD-R and BD-RE media. In our tests, the DH-41BS was able to read BD-R discs at 4x and BD-R DL media at about 2x. For whatever reason, the 1/3 and full seek times were much lower than they should have been.

Sony BD-R DL

Unfortunately, the DH-4B1S ran into some trouble when reading BD-R DL media. I tried a number of discs and the drive would either not recognize them at all or lock up the computer when I launched CD Speed. I finally found one that worked and as you can see, the DH-4B1S read it at 2x from start to finish.