4160B & Ridata 16X DVD+R media



My LG 4160B drive will only recognize some Ritek/Ridata 16X DVD+R discs as 4X. I have been able to use Sony 8X media without problems with this drive.

Is there a known problem between my drive and data? Is there a firmware upgrade that fixes this problem?

Has anyone found 16X media that works with this drive? Has anyone tried Verbatim 16X?