Ok..I was concerned about burn quality so burned a few discs and checked things out with Nero CD Speed
Burner is 40125S converted to 48125W
Media used Philips 40x cdrs..CMC smartburn rates at 48x
used acouple Fuji,,Taiyo Yuden rated at 24x smartburn say ok at 40x..
CMC disc...I have noticed few damaged sectors at the end of larger burns..650 mg+ so speed is getting close to max of 48x
running nero cd quality check I will from 0 errors up to 170 or so errors almost always 0%..once 6500 errors or 0.0001%
Scan disc..has given most discs 99+% good usually less than 1% damaged(scandisc reported 99% good sectors on the disc with 6500 errors by cd quality check)...my last block is always unreadable..I assume this is because I closed the disc(I see it with Taiyo Yuden)
I had one disc report 93% good 7% bad with couple of unreadable sectors...
Philips 40x cdr..burned a 575 mg ISO on 2 different CMC media with smartburn on at 48x(does not get to 48x of course file is too small..hit 48x near the 70 minmark)
1. disc 93% good
7% bad with a few unreadable sectors..I think there was 2...not including last sector
other 99.12% good no unreadable except last sector
Now Taiyo Yuden..Fuji 24x cdr..same iso file..575..burned one with smartburn on ..burn at max of 40
99.7+ % good ..one da,maged sector..and last unreadable
second..no smartburn with max 48x..
99% or so good...2 unreadable included last sector...2 damaged sectors
Interestingly burn speed were same with smart burn on for all 3 disc..2 CMC and 1 Taiyo Yuden....1 TY no smartburn burned 2 sec slower
It seems to me either the media is still a bit poor for 40x writing and up or the writer is not very accurate at these speeds...
I did check a TY burned at 24x on 24102b..100% good
there are more damaged(not unreadable) sectors on my 650mg + burns as speeds approach 48x..just not sure what this is going to translate too
Also the TY disc seem to better quality with less variation in my small test burning at 40x vs rated 24x than the CMC rated at 40x...I debating on returning them to Staples and complaining and trying to different brand..more money for less disc like Sony....
I knew I was going to hate this Taiwan made discs again...
I waiting for Fuji 40x TY discs...hope they do not go back to crap taiwan made though
One more important note..I did test several of these CMC disc with the file test on Nero CD Speed and CD Check and the files showed no errors...so what does the other errors really mean..bad data in month, year, 2 yrs ..etc