4x DVD-R/-RW Supported Firmware Update 
- Important Notice:

1. 4x writing speed for DVD-R media are supported.

2. This version is for testing ONLY.

3. Only available for dual firmware (B3x7 series) drive, not available for DW800A (B2x7 series) drive. 

- 4x DVD-R Media Support List:

1 TY 4x 
2 CMC 4x 
3 MKM 4x 
4 Ritek 4x 
5 SONY 4x 
6 MBI 4x 
7 TDK 4x 
8 Prodisc 4x 
9 Mexell 4x 
10 Infodisc 4x
11 Princo 4x 
12 Fujifilm 4x 
13 GST 4x