I set IB to verify put a R2 DVD and it finished secuessfuly.
Here's some info:
HL-DT-ST DVDRAM GSA-T10N PR03 (ATA)
Current Profile: DVD-ROM
Disc Information:
Status: Complete
Erasable: No
Sessions: 1
Sectors: 3,605,376
Size: 7,383,810,048 bytes
Time: 801:13:51 (MM:SS:FF)
TOC Information:
Session 1...
-> Track 01 (Mode 1, LBA: 0 - 3605375)
-> LeadOut (LBA: 3605376)
Physical Format Information (Last Recorded):
Book Type: DVD-ROM
Part Version: 1
Disc Size: 120mm
Maximum Read Rate: 10.08Mbps
Number of Layers: 2
Track Path: Parallel Track Path (PTP)
Linear Density: 0.293 um/bit
Track Density: 0.74 um/track
First Physical Sector of Data Area: 196,608
Last Physical Sector of Data Area: 2,055,631
Last Physical Sector in Layer 0: 0
Layer Information:
Layer 0 Sectors: 1,859,024 (51.56%)
Layer 1 Sectors: 1,746,352 (48.44%)