PI/PO errors

You will always get PI/PIF errors when you burn discs, and they exist in factory pressed discs too, so it's unavoidable. All hardware is able to compensate for such errors, but fewer errors means smoother reads. Only when such errors exceed normal boundaries will your drive refuse to read them. Generally, a good burn should have fewer than 280 PI errors and fewer than 4 PIO errors per large area on the disc; of course, lower is always better.

Different combinations of burners, firmware, and media will give different results, and you should experiment a little to see which combination works the best for you.

Jam it back in, in the dark.