I have the same problem as you… Verbatim DVD-R 8x (MCC 02RG20) burned last summer with nero as data dvd (.mp3, .avi) at 4x (singe session, finalized, veryfied)… and worked well… after a while it became unreadable (sony aw-g170a, pioneer 109, pioneer 111d, nec xxx)… like blank dvd… and auto run offers burn… dvd is readable in standalone dvd player philips dvp3010 as well…
I tried dvd recovery tools (many of them) and found session (track 01) only with isobuster 2.0 but can’t recover files… dvd is not physicaly damaged, seems like the dvd structure is corrupted… that standalone dvd player philips dvp3010 somehow overrides…
And what should can I do more… thinking of trying to connect philips dvp3010 that reads mentioned dvd to standalone DVD recorder and copy dvd… somehow if it’s possible…
Generated with DVDInfo:
Media Information
Region information N/A not a DVD-VIDEO
Media code/Manufacturer ID MCC 02RG20
Format Capacity Blank Disc
Book Type Unknown
Media Type DVD-R
Manufacturer Rated Speed 16.0x 22160KBps
Available Write Descriptor CLV 12.0x 16620KBps
Available Write Descriptor CLV 8.0x 11080KBps
Available Write Descriptor CLV 6.0x 8310KBps
Available Write Descriptor CLV 4.0x 5540KBps
Available Write Descriptor CLV 2.0x 2770KBps
Write Strategy Speed 4.0x 5540KBps
2x Speed OPC beta 09
2x Speed OPC power 0D
2x Write Strategy field 1 13 87 78 80
2x Write Strategy field 2 88 80 00 00 00 00
4x Speed OPC beta 05
4x Speed OPC power 15
4x Write Strategy field 1 0D 10 0B 0A
4x Write Strategy field 2 98 08 0F 0B
4x Write Strategy field 3 80 00 00 00
4x Speed OPC beta multi-pulse 07
4x Speed OPC power multi-pulse 19
4x Write Strategy field 4 15 A7 88 75
4x Write Strategy field 5 99 BC AA A2 20 22
4x Write Strategy field 6 00 00 D0 00 00
Linear Density Blank Disc
Track Density Unknown
Number of Layers 1
Complete Media Code
00000000 00 AA 00 00 01 40 C1 FD 9E D8 52 00 02 85 0D 10 …@…R…
00000010 88 9A 80 00 03 4D 43 43 20 30 32 00 04 52 47 32 …MCC 02…RG2
00000020 30 20 20 00 05 88 80 00 00 00 02 00 06 09 0D 13 0 …