Creating PSX ISO using alcohol

I am having some problems here, it seems that alcohol would stop after a while, mostly around 80%, saying sector errors.

The same goes for Clone CD.

What is wrong? My CD is original.

If you’re getting read errors on a psx cd then either your cd is damaged (i.e. scratched or whatever) or it’s an Asian pirate copy (those bought in Bali for example nearly always have numerous unreadable sectors from about the 80% mark on).

There shouldn’t be any read errors at all with an undamaged original and licensed psx cd.