Release for distribution of version 0.90 dated August 2001 of the DVD+MRW Defect Management & Physical Formatting System. This document defines methods for Defect Management and Physical Background Formatting that can be applied to DVD+RW. Applying the procedures and formats described in this document will improve the performance of the DVD+RW system in a computer environment. note:Distribution is expected to start September 17, 2001. NULL