Strange ImgBurn refuses to write to the DataWrite discs even at 2.4x - oh well, I know know, don't I !!!
I broke into a keg of Verbatim discs (I'm still halfway through a keg of 100 DataWrite discs) and ImgBurn works, log below:
I 16:43:26 ImgBurn Version 2.5.0.0 started!
I 16:43:26 Microsoft Windows Vista Ultimate Edition (6.0, Build 6002 : Service Pack 2)
I 16:43:26 Total Physical Memory: 3,142,804 KB - Available: 1,792,640 KB
I 16:43:26 Initialising SPTI...
I 16:43:26 Searching for SCSI / ATAPI devices...
I 16:43:27 Found 1 BD-ROM/HD DVD-ROM and 1 BD-RE!
I 16:45:34 Operation Started!
I 16:45:34 Source File: C:\Users\Secu1\Downloads\en_windows_7_ultimate_x86_dvd_x15-65921.iso
I 16:45:34 Source File Sectors: 1,221,628 (MODE1/2048)
I 16:45:34 Source File Size: 2,501,894,144 bytes
I 16:45:34 Source File Volume Identifier: GRMCULFRER_EN_DVD
I 16:45:34 Source File Volume Set Identifier: 315f0800MS UDFBridge
I 16:45:34 Source File Application Identifier: CDIMAGE 2.54 (01/01/2005 TM)
I 16:45:34 Source File Implementation Identifier: Microsoft CDIMAGE UDF
I 16:45:34 Source File File System(s): ISO9660 (Bootable), UDF (1.02)
I 16:45:34 Destination Device: [1:0:0] MATSHITA BD-RE UJ-220 1.00 (D:) (ATA)
I 16:45:34 Destination Media Type: DVD+R (Disc ID: MCC-004-00) (Speeds: 2.4x, 4x, 6x, 8x)
I 16:45:34 Destination Media Sectors: 2,295,104
I 16:45:34 Write Mode: DVD
I 16:45:34 Write Type: DAO
I 16:45:34 Write Speed: MAX
I 16:45:34 DVD+R Reserve Track: No
I 16:45:34 Link Size: Auto
I 16:45:34 Lock Volume: Yes
I 16:45:34 Test Mode: No
I 16:45:34 OPC: No
I 16:45:34 BURN-Proof: Enabled
I 16:45:34 Filling Buffer... (40 MB)
I 16:45:35 Writing LeadIn...
I 16:45:57 Writing Session 1 of 1... (1 Track, LBA: 0 - 1221627)
I 16:45:57 Writing Track 1 of 1... (MODE1/2048, LBA: 0 - 1221627)
I 16:53:28 Synchronising Cache...
I 16:53:31 Closing Track...
I 16:53:32 Finalising Disc...
I 16:53:51 Exporting Graph Data...
I 16:53:51 Graph Data File: C:\Users\Secu1\AppData\Roaming\ImgBurn\Graph Data Files\MATSHITA_BD-RE_UJ-220_1.00_10-OCTOBER-2009_16-45_MCC-004-00_MAX.ibg
I 16:53:51 Export Successfully Completed!
I 16:53:51 Operation Successfully Completed! - Duration: 00:08:17
I 16:53:51 Average Write Rate: 5,417 KB/s (3.9x) - Maximum Write Rate: 8,576 KB/s (6.2x)
I 16:53:51 Cycling Tray before Verify...
W 16:54:12 Waiting for device to become ready...
I 16:54:18 Device Ready!
I 16:54:20 Operation Started!
I 16:54:20 Source Device: [1:0:0] MATSHITA BD-RE UJ-220 1.00 (D:) (ATA)
I 16:54:20 Source Media Type: DVD+R (Book Type: DVD-ROM) (Disc ID: MCC-004-00) (Speeds: 2.4x, 4x, 6x, 8x)
I 16:54:20 Image File: C:\Users\Secu1\Downloads\en_windows_7_ultimate_x86_dvd_x15-65921.iso
I 16:54:20 Image File Sectors: 1,221,628 (MODE1/2048)
I 16:54:20 Image File Size: 2,501,894,144 bytes
I 16:54:20 Image File Volume Identifier: GRMCULFRER_EN_DVD
I 16:54:20 Image File Volume Set Identifier: 315f0800MS UDFBridge
I 16:54:20 Image File Application Identifier: CDIMAGE 2.54 (01/01/2005 TM)
I 16:54:20 Image File Implementation Identifier: Microsoft CDIMAGE UDF
I 16:54:20 Image File File System(s): ISO9660 (Bootable), UDF (1.02)
I 16:54:20 Read Speed (Data/Audio): MAX / MAX
I 16:54:20 Verifying Session 1 of 1... (1 Track, LBA: 0 - 1221627)
I 16:54:20 Verifying Track 1 of 1... (MODE1/2048, LBA: 0 - 1221627)
I 17:00:27 Exporting Graph Data...
I 17:00:27 Graph Data File: C:\Users\Secu1\AppData\Roaming\ImgBurn\Graph Data Files\MATSHITA_BD-RE_UJ-220_1.00_10-OCTOBER-2009_16-45_MCC-004-00_MAX.ibg
I 17:00:27 Export Successfully Completed!
I 17:00:27 Operation Successfully Completed! - Duration: 00:06:06
I 17:00:27 Average Verify Rate: 6,675 KB/s (4.8x) - Maximum Verify Rate: 8,932 KB/s (6.4x)