This was burned at 8x using default MCC03RG20 write strategy on B7W9 firmware. FYI, I actually made a couple of coasters when burning with this setting:
This was burned at 12x using TYG02 write strategy:
I am not sure why my writer is not good with MCC03RG20. This media code is listed in the B7W9 firmware when I checked with MCSE with burn speed up to 16x. But when I try to burn it at 16x, the speed goes up to 6x then slowly goes back to 4x. I think my writer did not recognize the MCC03RG20 media.
I did some search and I found out it burns fine on some people's DW1620 but there are also cases of DW1620 owners having similar problem as me. Did I get a bad batch or is there something wrong with my wirter or firmware?
Here is a scan of Verbatim 16x DVD+R (MCC004) just for comparsion: