I've been trying for about a week, various attempts to fix this strange problem that has resurfaced recently. It involves MCC 003 and 004 media, burned or blank. For whatever reason it does not read or recognize this media anymore. It will read MKM 003 and YUDEN000-T02 discs, but not burned YUDEN000-T02. I also noticed that my AS database is empty, which is not something I've seen before. Basically I've tried reflashing the the same firmware (I was using 1.08, the last FW for this drive), downgrading and upgrading, installing Plextools Professional XL after uninstalling the LE version, and countless times retrying blank or filled discs.
When this happened to this drive before, I simply put in a blank disc from a brand new spindle, and for whatever reason, that media code was readable again from my drive.
Thanks if you can help this poor soul out!