Can individual discs be riplocked?

[Cormaster628]

My drive does not have riplock and I've acheived speeds as high as 8x while ripping before but some blu-ray's won't go higher than 2x regardless. Most recently trying to rip Star Wars episode 4, and it's taking it's time ripping at 2x. Do some discs just have riplock built in or something?

[matt198t]

I've also noticed this. Strange.