Please read instruction
http://sony.storagesupport.com/cdrw/downloads/crx85u/fw_manual/85Uupdate.html

What's New:

Enhancements made by this Firmware Update include the following...

* Supported media added
* DVD read speed performance improved
* Fixes ATAPI error "AA030C08" that occurs during write operation
* Whole writing performance & reliability improvements
* Other fixes