Just tried to burn a bootable Windows repair disc but encountered lots of errors so not sure if its the drive or the burn?
I 21:51:59 ImgBurn Version 2.5.6.0 started!
I 21:51:59 Microsoft Windows 7 Ultimate x64 Repair Disc
I 21:51:59 Total Physical Memory: 4,192,760 KB - Available: 3,054,788 KB
I 21:51:59 Initialising SPTI...
I 21:51:59 Searching for SCSI / ATAPI devices...
I 21:51:59 -> Drive 1 - Info: HL-DT-ST DVDRAM GH22NS50 TN02-01 (J:) (ATA)
I 21:51:59 Found 1 DVD±RW/RAM!
I 21:52:17 Operation Started!
I 21:52:17 Device: [0:0:0] HL-DT-ST DVDRAM GH22NS50 TN02 (J:) (ATA)
I 21:52:17 Media Type: DVD+RW (Disc ID: MKM-A02-00)
I 21:52:17 Media Supported Write Speeds: 2.4x, 4x
I 21:52:17 Quick Erase: No
I 21:52:17 Format Properly: Yes
I 21:52:17 Format Size: Preferred
I 21:52:17 Erasing Disc...
I 22:08:20 Operation Successfully Completed! - Duration: 00:16:02
I 22:08:27 Operation Started!
I 22:08:27 Source File: C:\Users\James\Downloads\Microsoft Windows 7 Ultimate x64 Repair Disc.iso
I 22:08:27 Source File Sectors: 1,823,885 (MODE1/2048)
I 22:08:27 Source File Size: 3,735,316,480 bytes
I 22:08:27 Source File Volume Identifier: CD_ROM
I 22:08:27 Source File Volume Set Identifier: CD_ROM
I 22:08:27 Source File Application Identifier: OSCDIMG 2.55 (01/01/2005 TM)
I 22:08:27 Source File File System(s): ISO9660 (Bootable)
I 22:08:27 Destination Device: [0:0:0] HL-DT-ST DVDRAM GH22NS50 TN02 (J:) (ATA)
I 22:08:27 Destination Media Type: DVD+RW (Disc ID: MKM-A02-00)
I 22:08:27 Destination Media Supported Write Speeds: 2.4x, 4x
I 22:08:27 Destination Media Sectors: 2,295,104
I 22:08:27 Write Mode: DVD
I 22:08:27 Write Type: DAO
I 22:08:27 Write Speed: MAX
I 22:08:27 Link Size: Auto
I 22:08:28 Lock Volume: Yes
I 22:08:28 Test Mode: No
I 22:08:28 OPC: No
I 22:08:28 BURN-Proof: Enabled
I 22:08:31 Write Speed Successfully Set! - Effective: 5,540 KB/s (4x)
I 22:08:31 Book Type Setting: N/A
I 22:08:32 Filling Buffer... (40 MB)
I 22:08:32 Writing LeadIn...
I 22:08:33 Writing Session 1 of 1... (1 Track, LBA: 0 - 1823884)
I 22:08:33 Writing Track 1 of 1... (MODE1/2048, LBA: 0 - 1823884)
I 22:19:46 Synchronising Cache...
W 22:19:47 Potential 'WaitImmediateIO' Deferred Error - (2/3) - Unknown (ASC: 0x90, ASCQ: 0x80)
W 22:19:47 Synchronise Cache Failed! - Reason: Unknown (ASC: 0x90, ASCQ: 0x80)
W 22:19:47 Retrying (1 of 3)...
W 22:19:48 Potential 'WaitImmediateIO' Deferred Error - (0/3) - Unknown (ASC: 0x90, ASCQ: 0x80)
W 22:19:48 Retry Failed - Reason: Unknown (ASC: 0x90, ASCQ: 0x80)
W 22:19:48 Retrying (2 of 3)...
W 22:19:49 Potential 'WaitImmediateIO' Deferred Error - (0/3) - Unknown (ASC: 0x90, ASCQ: 0x80)
W 22:19:49 Retry Failed - Reason: Unknown (ASC: 0x90, ASCQ: 0x80)
W 22:19:49 Retrying (3 of 3)...
W 22:19:50 Potential 'WaitImmediateIO' Deferred Error - (0/3) - Unknown (ASC: 0x90, ASCQ: 0x80)
W 22:19:50 Retry Failed - Reason: Unknown (ASC: 0x90, ASCQ: 0x80)
I 22:20:01 Closing Session...
I 22:20:02 Exporting Graph Data...
I 22:20:02 Graph Data File: C:\Users\James\AppData\Roaming\ImgBurn\Graph Data Files\HL-DT-ST_DVDRAM_GH22NS50_TN02_20-MARCH-2012_22-08_MKM-A02-00_MAX.ibg
I 22:20:02 Export Successfully Completed!
I 22:20:02 Operation Successfully Completed! - Duration: 00:11:34
I 22:20:02 Average Write Rate: 5,428 KB/s (3.9x) - Maximum Write Rate: 5,693 KB/s (4.1x)
I 22:20:02 Cycling Tray before Verify...
W 22:20:11 Waiting for device to become ready...
I 22:20:36 Device Ready!
I 22:20:39 Operation Started!
I 22:20:39 Source Device: [0:0:0] HL-DT-ST DVDRAM GH22NS50 TN02 (J:) (ATA)
I 22:20:39 Source Media Type: DVD+RW (Book Type: DVD+RW) (Disc ID: MKM-A02-00)
I 22:20:39 Source Media Supported Write Speeds: 2.4x, 4x
I 22:20:39 Image File: C:\Users\James\Downloads\Microsoft Windows 7 Ultimate x64 Repair Disc.iso
I 22:20:39 Image File Sectors: 1,823,885 (MODE1/2048)
I 22:20:39 Image File Size: 3,735,316,480 bytes
I 22:20:39 Image File Volume Identifier: CD_ROM
I 22:20:39 Image File Volume Set Identifier: CD_ROM
I 22:20:39 Image File Application Identifier: OSCDIMG 2.55 (01/01/2005 TM)
I 22:20:39 Image File File System(s): ISO9660 (Bootable)
I 22:20:39 Read Speed (Data/Audio): MAX / MAX
I 22:20:40 Verifying Session 1 of 1... (1 Track, LBA: 0 - 1823884)
I 22:20:40 Verifying Track 1 of 1... (MODE1/2048, LBA: 0 - 1823884)
W 22:21:26 Failed to Read Sector 1552 - Reason: Unrecovered Read Error
W 22:21:26 Sector 1552 maps to File: \BOOT\BOOT.SDI
W 22:22:37 Failed to Read Sector 1552 - Reason: Unrecovered Read Error
W 22:22:37 Sector 1552 maps to File: \BOOT\BOOT.SDI
W 22:22:46 Failed to Read Sector 1553 - Reason: Unrecovered Read Error
W 22:22:46 Sector 1553 maps to File: \BOOT\BOOT.SDI
E 22:22:47 Failed to Read Sector 1553 - Reason: Unrecovered Read Error
E 22:22:47 Sector 1553 maps to File: \BOOT\BOOT.SDI
E 22:22:48 Failed to Verify Sectors!
I 22:22:49 Exporting Graph Data...
I 22:22:49 Graph Data File: C:\Users\James\AppData\Roaming\ImgBurn\Graph Data Files\HL-DT-ST_DVDRAM_GH22NS50_TN02_20-MARCH-2012_22-08_MKM-A02-00_MAX.ibg
I 22:22:49 Export Successfully Completed!
E 22:22:49 Operation Failed! - Duration: 00:02:08
I 22:22:49 Average Verify Rate: 24 KB/s (0.0x) - Maximum Verify Rate: 32 KB/s (0.0x)