I’ve been scouring the Internet in an attempt to understand the difference between a PIF and an PO value. I understand pretty much everything else, e.g.
PI = PIE = Parity Inner Error, which will undergo Parity Inner Correction Attempt
PIF = Parity Inner Failure, Attempt to correct PIE with inner parity failed
PO = POE = Outer Parity Error = What remains after parity inner correction? Wouldn’t this mean POE = PIF? … ?!?
POF = Parity Outer Failure, i.e. a POE could not be corrected on the outer parity level. This is a hard error that causes a CRC32 read error and makes the DVD unusable. Maybe the DVD can still be read in a better DVD drive that will still be able to correct the POE, thereby avoiding the POF.
Some people say PIF = POE, others say PIF != POE. So how are these two related?!? Is one always greater than the other? Is it a matter of definition? How much can the relationship between PIF and POE vary? (factor of 4x or larger etc.)?