QUOTE(greynol @ Apr 10 2008, 14:06)

Why stop there when switching between the use of C2 pointers and read twice and compare (non-C2 rips) can also reveal errors?
I have encountered multiple instances where Burst and C2 rips delivered one CRC while non-C2 rips delivered another CRC. Also, non-C2 rips will use a different block size from C2 rips so the beginning of each new read will occur at different places and quite probably the overlap in order perform synchronization will begin at different places on the disc as well. For burst rips, the situation is different in that no synchronization is performed.
Oh yeah, I totally agree. The more diversity the better. But you have to start somewhere.
I believe that the secure-C2 and secure-non-C2 are quite similar in the way they operate (read command used, synchronisation, code path), whereas the burst was more different. Spoon claim that C2 work (and I've seen that), which balances the case you describe above.
So, to cover all bases, you would need to try all three, burst, secure-C2 and secure-non-C2. However, there are practical issues.
First, doing 3 different passes add more time, especially that the non-C2 pass tend to be slower than C2 passes. Agreed, in around 60% of cases, you have a AR match and don't do the second and third pass.
Second, the current UI of EAC only allow to compare two passes, the Test and the Copy passes.
Third, at this level of paranoia, you are better off using a second drive, I believe that will give you better diversity than three different modes on the same drive.
T&C is well established with people, and they understand it well. Changing mode between the T and the C is a small change to the procedure, and there is hope that people would start to adopt that (I wish EAC was easier). Asking them to add a third pass is a much more significant change to their workflow.
Note that I've submitted a wishlist to Andre to make mixed-mode T&C easier to do with EAC, maybe other people could convince him...
http://www.digital-inn.de/133042-post201.htmlIt's all about different level of paranoia, and the probability of an error to slip through. I can not guarantee that the most paranoid procedure would catch all errors. So, in other words, nothing is 100% secure. Also, I believe that people need to make their own mind and balance it with convenience.
Thanks, and have fun...
Jean