i had a sony 8x4x32 cdrw.. for some reason, it burns cd ok, but when i tried to verify the disk for reading using ontrack system suite's disk verifier, i always get 1 or 2 files with either 'system can't read the file' or 'crc erros'.. these errors didn't show up 2 days ago when i made a couple cd's.. all of the sudden, they are showing up today.. does anyone know what's wrong with my cd burner?