Yes, the debug data kept repeating. Trying incremental write...
Well, another coaster and rebooting again... same issue, logs below:
I 17:50:13 Source File Application Identifier: UltraISO V8.6 CD & DVD Creator, ©2008 EZB Systems, Inc.
I 17:50:13 Source File File System(s): ISO9660, Joliet
I 17:50:13 Destination Device: [0:1:0] HL-DT-ST BDDVDRW GGC-H20L 1.03 (F:) (ATAPI)
I 17:50:13 Destination Media Type: DVD+R (Disc ID: SONY-D11-00) (Speeds: 4x, 8x)
I 17:50:13 Destination Media Sectors: 2,295,104
I 17:50:13 Write Mode: DVD
I 17:50:13 Write Type: Incremental
I 17:50:13 Write Speed: MAX
I 17:50:13 DVD+R Reserve Track: No
I 17:50:13 Link Size: Auto
I 17:50:13 Test Mode: No
I 17:50:13 OPC: No
I 17:50:13 BURN-Proof: Enabled
I 17:50:13 Book Type Setting: DVD-ROM
I 17:50:14 Filling Buffer... (40 MB)
I 17:50:14 Writing LeadIn...
I 17:50:36 Writing Session 1 of 1... (1 Track, LBA: 0 - 887506)
I 17:50:36 Writing Track 1 of 1... (MODE1/2048, LBA: 0 - 887506)
I 17:53:37 Synchronising Cache...
W 17:53:59 I/O Interface 'Debug Mode' has been Enabled!
I 17:53:59 [0:1:0] HL-DT-ST BDDVDRW GGC-H20L 1.03 (F:) (ATAPI)
I 17:53:59 CDB: 25 00 00 00 00 00 00 00 00 00
I 17:53:59 CDB Interpretation: Read Capacity
E 17:53:59 SENSE: 70 00 02 00 00 00 00 0A 00 00 00 0E 04 08 00 80 00 00 00 00 00 00 00 00
E 17:53:59 SENSE Interpretation: Logical Unit not ready, Long Write in progress
I 17:54:00 [0:1:0] HL-DT-ST BDDVDRW GGC-H20L 1.03 (F:) (ATAPI)
I 17:54:00 CDB: 25 00 00 00 00 00 00 00 00 00
I 17:54:00 CDB Interpretation: Read Capacity
E 17:54:00 SENSE: 70 00 02 00 00 00 00 0A 00 00 00 0E 04 08 00 80 00 00 00 00 00 00 00 00
E 17:54:00 SENSE Interpretation: Logical Unit not ready, Long Write in progress
I 17:54:01 [0:1:0] HL-DT-ST BDDVDRW GGC-H20L 1.03 (F:) (ATAPI)
I 17:54:01 CDB: 25 00 00 00 00 00 00 00 00 00
I 17:54:01 CDB Interpretation: Read Capacity
E 17:54:01 SENSE: 70 00 02 00 00 00 00 0A 00 00 00 0E 04 08 00 80 00 00 00 00 00 00 00 00
E 17:54:01 SENSE Interpretation: Logical Unit not ready, Long Write in progress
I 17:54:02 [0:1:0] HL-DT-ST BDDVDRW GGC-H20L 1.03 (F:) (ATAPI)
I 17:54:02 CDB: 25 00 00 00 00 00 00 00 00 00