Lg Gsa-h10li. burning speeds

my dvd burner is ripping slower and slower everytime i try to rip from a dvd or burn a dvd. it just keeps getting slower. it takes about 2 hours to rip from a dvd it used to take 30-40 min and it takes about 50 min to burn a dvd. i need help

check if your drive is in dma mode.