Defective Disc: unreadable @ 8x speed, no errors @ Maximum?

[dvdr]

I usually rip with a Plextor 1210a and 230a at 8x speed (AR-Rip + min. 2 secure reads) to ensure a proper read.
I encountered a ripping problem with a really badly damaged disc - 13.000 and more frames to rerip, giving up after 30 unrecoverable frames. Shutting off "mark as error" the resulting files of 3 tracks stuttered with heavy dropouts.
I put the CD into a LiteOn Lightscribe DVD-burner with the same settings and set the read speed to maximum - NO frames to rerip! Setting the read-speed to 24, 12, 8 resulted in errors again - the slower the speed, the more frames to rerip.

:confused::confused:

Unfortunately, the CD is not in the AR database, so I have no clue, whether the max-speed-LiteOn rip is accurate.
But listening to the ripped tracks, at least no stutter or dropouts are audible, they seem to be fine, not even distortion in those 40-seconds-plus long sections, that used to stutter

So: is there any explanation for this? Shouldn't slower ripping speeds enable a laser to stay better "in focus" and pick up "track" after defective zones more easily? Is there a common recommendation of ripping speeds (talking about things like higher jitter at high ripping speeds)?

Thanks!

[Spoon]

Re: Defective Disc: unreadable @ 8x speed, no errors @ Maximum?

No often with modern CD drives a slower speed makes it more difficult for the disc to be read.

[bhoar]

Re: Defective Disc: unreadable @ 8x speed, no errors @ Maximum?

In addition, the Lite-On might have a very good "cover up errors" algorithm. That is, you know you're not getting an accurate rip, but you're getting one that sounds less bad.

-brendan