I think that the process of error correction, with the red lights, consists in rereading 16 times until 8 at least (or 9 at least ?) match.
Is this also correct when C2 is enabled ? It would be better if it would reread until no C2 is reported anymore.
A test (
http://www.hydrogenaudio.org/index.p...ST&f=20&t=9049 ) showed that reading twice might not be as secure as previously thought. Note that when you get wrong results in non C2 mode, the CRCs are likely the same (both wrong), thus there is no way to detect the problem.
In this case, it would be much better to reread until no C2 is reported, otherwise, enabling C2 would be unuseful, since the extra (consistent) errors detected by C2 would not be corrected.
In this test,a reference file was burned on CD, then the CD was damaged and read twice in burst mode.
There were 10641 errors.
1930 (18.1 %) of them were consistent, thus would have not been detected without C2.
22 of them were consistant and isolated (far away from any inconsistent error). Thus would not have been corrected for sure (other consistent ones may be corrected when a nearby inconsistent error is detected).
Thus the accuracy of EAC without C2 in this test would have been between 81.9 and 99.8 %.
Now if we take a drive with 99.9 or 100% C2 accuracy, if the error correction is done by rereading until a majority match, the accuracy with C2 will be 81.9 to 99.8 % for this test. If rereading is done until no C2 occurs, it would be 99.9 or 100 %