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Donâ€™t even consider any other DVD+R DL Media other than Verbatim DVD+R DL MKM001/MKM003 Mitsubishi Kagaku Media. ALL other DVD+R DL Media is considered suspect and should be avoided (not used).
Any Modern quality DVD Burner that Book Type Bit Sets DVD+R DL Media to Book Type DVD-ROM with work in making XBox 360 backups.
Making XBox 360 backups is an Art/Science and suggest visiting the dedicated CD Freaks Game Consoles Forum (http://club.cdfreaks.com/f98/) for information on XBox 360 backups.