I am having the same problem with my backup....i can read original fine just my backup will sit there reading... for like few mins then finally say "unrecognised disc"
heres the info from dvdinfopro for my backup disc. can anyone give us some other ideas? i burnt the disc at 2.4x
Media Information
Disc Regions are = 1,2,3,4,5,6,7,8
Media code/Manufacturer ID = MKM 001
Media Product Revision Number = 00h
UDF Format Type = V1.02
UDF Volume Name = XBOX360
UDF Application id = None
UDF Implementation id = Daikin U.S. Comtec Lab
UDF Recording Date/Time (mm/dd/yyyy) = 10/ 7/2005 12:18:46
Format Capacity = 6.81GB(7.31GB)
Book Type = DVD-ROM
Media Type = DVD+R DL
Data area starting sector = 30000h
Data area end sector = 3670FFh
Layer 0 end sector = 20339Fh
Linear Density = 0.293um/bit
Track Density = 0.74um/track
Number of Layers = 2
Layer Track Path direction = (OTP) Opposite track path
Complete Media Code
00000000 08 02 00 00 01 0F 31 10 00 03 00 00 00 F9 09 BF ......1.........
00000010 00 20 33 9F 00 00 00 4D 4B 4D 00 00 00 00 00 30 . 3....MKM.....0
00000020 30 31 00 40 25 25 37 0C 02 2F 63 02 2F 63 21 23 01.@%%7../c./c!#
00000030 0D 0E 14 14 02 01 01 10 00 21 23 0D 0E 14 14 02 .........!#.....