Redump Forum

alright, if you get junk when going back 2.74 sec and valid data sector at  3 sec
(look for '00 ff ff ff ff ff ff ff ff ff ff 00' sync pattern)
it would almost certainly be 2.74 then
to be completely sure about this offset you could check this CD with d8 capable drive
or do CD swapping thing

On my +667 drive I have the following.

I get only zero's if I move back 2 sec (150).


I get some data if I move back 2.74 sec (224)


On my other drive with +102, I have again zero's when moving back 2 sec and an error when moving back immediately more than 2 sec.

on 2nd image it is data from the end of sector 130443
so that would mean 0 offset and 3.0 s gap after all i guess

Here is the gap detection in EAC. I have 2 sec for the first track and 1.73 for the 11th. As I already stated if I go back 2 sec, I get only zero's but if I go 3 sec back I have data, resulting in 0 Write Offset. Let's assume EAC is wrong and I have 3 sec for the first track. The issue now is with the 11th track. I've also attached the sub screenshot and it seems to have only 73 sectors (224616 - 224468 = 148). Is this possible ?

it does look so indeed from channel Q

some CDs are very messed up in this regard
with all gaps weird and stuff
usually older ones
equipment must have had some threshold for error tolerance when mastering i guess
larger at first, since consumer hardware wasn't that accurate those days too
e.g. PSX would position to requested second not frame
so 1:74 or 1:75 marker in subcode would mean little to it