Typically to test my drives fully, I do a DL DVD burn, things like layerbreaks tend to show massive spikes in PI/PO avg/peak...it also allows you to see how the laser acts over longer periods of time.
If you have a dual layer DVD-R or DVD+R (xbox360 uses +R fyi) go ahead and try it out. Keep in mind if you dont use good media, you'll get bad results, and it won't be the drive's fault. I'll try and get some graphs/results for you to see what I mean here later this afternoon.
In the meantime, the writer of imgBurn (Lightning UK!) assisted us (on a different forum for XBOX360 modders) in coming up with optimal settings, and although its entirely drive dependent, it gives a great place to start from. Best of luck.
If you have any other questions feel free to post/ask/reply/whatever!
Where did you come up with the speeds to use for your scans? 10x seems rediculously high, I mean i get its a CDR, but i generally use 2.4x or 4x, cause I know
Date : 8/16/2015 3:37:30 PM
Model : 1-0-2-0 G:PLEXTOR DVDR PX-880SA 1.13
Disc : DVD+R DL , MBIPG101R12 [Moser Baer India Limited]
Speed : 8x
ECC blocks sum (PI/PIF) : 8/1
Scanned range : 0 - 4267020
Sampling count : 244989
Errors : 0
PI Max : 499
PI Average : 43.67
PI Total : 1371728
PIF Max : 23
PIF Average : 10.71
PIF Total : 336474
at 8x i get outrageous results that if they truly we're that...the disc would not play in my XBOX or read anywhere..
im doing a 4x scan now....ill update with those results and show the difference (hopefully i dont put my foot in my mouth.