Does the DVD burner that ships in the SL510 ThinkPad support burning Dual Layer discs?
How can I tell if any particular burner supports this feature?
Many software applications will querry and display capabilities of the optical drives. One application is Nero's InfoTool (freeware), following is the direct link if the previous link doesn't work:- infotool.zip
If your DVD burner supports (both read and write) Dual Layer (DL), then the tool will show green tick mark against -R DL, +R DL.