Yes, It is not a good firmware for *DVD-RAM UJ-845S *. I do not know why they have post this firmware in the download of Qosmio G20-213.
They did not place a wrong firmware in the driver download form but the G20 Qosmio series has been equipped with different CD/DVD drives… so you have to check the right firmware before running the update… in “More Info” (on download page) you can find always details regarding the update… and here you could find also the CD/DVD drive number.