Here are the specs of the TDK disk I bought from Costco: Unique Disc Identifier : [DVD+R:CMC MAG-M01-000] Disc & Book Type : [DVD+R] - [Not Available] Manufacturer Name : [CMC Magnetics Corp.] Manufacturer ID : [CMC MAG] Media Type ID : [M01] Product Revision : [Not Specified] Blank Disc Capacity : [2,295,104 Sectors = 4.70 GB (4.38 GiB)] Recording Speeds : [1x-2.4x , 4x , 6x-8x , 6x-16x] At first I thought my modchip was DOA but then I tried my friends backup and it worked perfectly. Found out it was the TDK. I burned it at 2X and still no go. These DVD's work great for movies but CRAP for Wii backups. Just wanted to let everyone else know. Inputs welcome!