I tested three discs with both Kprobe 1.1.14 (on LiteOn 48246S, latest fw) and Plextools Professional 2.05 (on Plextor Premium, fw 1.02).
All discs were tested at 24x (NOT a max read speed).
The results are quite different. Take a look
Disc 1: Much higher c1 max/avg on Plex, no C2 reported on LiteOn
Disc 2: same differences as above
Disc 3: Differences in Average C1, max C1, existence of C2 and distribution of C1 as a function of time. VERY significant differences.
All discs were burned on the same day (Verbatim DataLifePlus SuperAzo 700Mb), totally faultless with no scratches and were taken from the burner to be tested (i.e. almost no handling for the discs, absolutely no smudges, dirt, etc).
Can anybody explain these results for me?
I mean, I was expecting *some* differences, but with at least roughly equal distribution of errors, error averages in the same order of magnitude and c. the same level of max c1/c2 error figures.
These test result differences point towards the conclusion that either:
A) Plextor Premium + PlexTools is not to be trusted
B) LiteOn + KProbe is not to be trusted
C) Both combos are not to be trusted
Am I doing something wrong?
Which drive/software combo should I trust?
If each drive's ability to read very high quality Mitsubishi chemical media rated for 48x (burned at 24x) at the read speed of 24x is so different from the other, then surely we cannot deduce ANYTHING useful about each result beyond the make of the drive on which the results were obtained (?).
If my tests are correct, Plex can't read Mitsubishi Chemicals discs properly and LiteOn can. If this is the case, then how about the rest of the drives in the world (MSI, Asus, TDK, Cendyne, Optorite, Yamaha, Teac, etc. etc.)????
I can accept the limitations of consumer cd-r quality testing, but these results (if correct) are so downright offputting that I'm not sure anything generally useful can be deduced from home-made c1/c2 measurements.