GSA-4160B slow read dvd-r

I have a GSA-4160B dvd burner and for some unknown reason some of the dvds I have backed up recently, when I try to rip them back to the hard disk they read realy slowly and takes like 30-40 mins to copy and most of the time it ends up failing near the end with errors. Burning speeds are fine though.

My machine is

AMD 2600+
1.5gb ram
LG GSA-4160B

The reason I ask this is the same disks rip 15mins perfecly fine on my older p3 with Pioneer 109D burner error free and quick.

Any thoughts on lg Burners extremely slow ripping speeds for dvd-r?