Read Instructions:
http://sony.storagesupport.com/legalagreement.zulu?dlid=dvdrw/downloads/710FWBYX5/FirmwareBYX5Update.htm

What's New:

Improvements:
Writing performance and reliability improvements.
Alternative drivers to Sony DRU-710A | DRX-710UL | DRX-710UL/T Firmware BYX5: