first - good question - 95% of the time the answer is to run your ripper with error correction on - at least thats the iTunes term for it, EAC probably calls it something else.
the rest of the time problems fall into two categories:
1) the more common in my experience - the disc looks like it was handled by a 4 year old with PB&J all over their tiny little fingers - no it won't read properly as it... BUT wash it with lukewarm soapy water, dry it with something non-abrasive and about 98 out of 100 times it will rip fine
2) some discs are in fact permanently mangled beyond salvation - this might affect one or two songs - it might affect all of them - my best advice is to look at the disc prior to purchase - if you see hideous deep scratches pass - or know that you are rolling the dies because the deal is too good to pass up
at which point you win some and you lose some
best,
ck
the rest of the time problems fall into two categories:
1) the more common in my experience - the disc looks like it was handled by a 4 year old with PB&J all over their tiny little fingers - no it won't read properly as it... BUT wash it with lukewarm soapy water, dry it with something non-abrasive and about 98 out of 100 times it will rip fine
2) some discs are in fact permanently mangled beyond salvation - this might affect one or two songs - it might affect all of them - my best advice is to look at the disc prior to purchase - if you see hideous deep scratches pass - or know that you are rolling the dies because the deal is too good to pass up
at which point you win some and you lose some
best,
ck