Optiarc AD 7170a says all media is full

so ive had this drive for about 6 months and everything has been fine with it. I went to burn a dvd the other day and it tells me to insert media with enough storage space. The problem here is that its a blank dvd+r. No Ive burned plenty of dvds and cds without any issues what so ever, not even media problems. I tried right after to burn a cd and the same thing happens. ive restarted the comp and still no luck. Is the drive bad??? thanks in advance guys