Like so many burners some brands work and some have problems. With a bit of trial and error you will find a brand or brands that will work fine in your burner. I think the DRU500A is the full retail version and the DW-U10A is OEM of the same model. I had a DW-U14A but was able to convert it to a DRU510A with a downloaded Firmware Hack, then could upgrade official Sony firmware upgrades from their site. Do not know if any available for the U10A, might be worth a search, worked really well.