Thanks for the suggestion - I should have thought of that...
Unfortunately, it didn't help. I tried 8X, 12X and 16X and get the same symptoms every time. Watching ImgBurn closely, I see the "Buffer" bar (not "Device Buffer") starts out at 100% and steadily decreases as the "Complete" bar nears 100%,
The Buffer bar goes completely empty by the time the Complete bar reaches 99%. It's as if the Complete bar can't reach 100% because there is no more data in the buffer left to write. However, the "Device Buffer" bar shows 100% at that point as if the writer's buffer is full.
I can abort, authorize "Attempt Close and Finalize" and the disk appears to be usable.
Any more suggestions?
Here's the latest log:
I 15:49:18 ImgBurn Version 2.5.7.0 started!
I 15:49:18 Microsoft Windows 7 Professional x64 Edition (6.1, Build 7601 : Service Pack 1)
I 15:49:18 Total Physical Memory: 4,125,840 KB - Available: 2,211,832 KB
I 15:49:19 Initialising SPTI...
I 15:49:19 Searching for SCSI / ATAPI devices...
I 15:49:19 -> Drive 1 - Info: PLEXTOR DVDR PX-L890SA 1.07 (E:) (ATA)
I 15:49:19 Found 1 DVD±RW/RAM!
I 15:49:41 Operation Started!
I 15:49:41 Source File: D:\Temp\ImgBurn\Lenovo_Recovery_Disk1.cue
I 15:49:41 Source File Sectors: 153,474 (MODE2/FORM1/2352)
I 15:49:41 Source File Size: 360,970,848 bytes
I 15:49:41 Source File Volume Identifier: CD_ROM
I 15:49:41 Source File Volume Set Identifier: CD_ROM
I 15:49:41 Source File Application Identifier: OSCDIMG 2.55 (01/01/2005 TM)
I 15:49:41 Source File File System(s): ISO9660 (Bootable)
I 15:49:41 Destination Device: [3:0:0] PLEXTOR DVDR PX-L890SA 1.07 (E:) (ATA)
I 15:49:41 Destination Media Type: CD-R (Disc ID: 97m26s66f, CMC Magnetics Corp.)
I 15:49:41 Destination Media Supported Write Speeds: 16x, 24x, 32x, 40x, 48x
I 15:49:41 Destination Media Sectors: 359,844
I 15:49:41 Write Mode: CD
I 15:49:41 Write Type: SAO
I 15:49:41 Write Speed: 16x
I 15:49:41 Lock Volume: Yes
I 15:49:41 Test Mode: No
I 15:49:41 OPC: No
I 15:49:41 BURN-Proof: Enabled
I 15:49:41 Write Speed Successfully Set! - Effective: 2,823 KB/s (16x)
I 15:49:41 Advanced Settings - Force HT: No, Online HT: No, OverSpeed: No, SmartBurn: Yes
I 15:49:41 Filling Buffer... (80 MB)
I 15:49:42 Writing LeadIn...
I 15:50:00 Writing Session 1 of 1... (1 Track, LBA: 0 - 153473)
I 15:50:00 Writing Track 1 of 1... (MODE2/FORM1/2352, LBA: 0 - 153473)
I 15:58:59 Abort Request Acknowledged
I 15:58:59 Synchronising Cache...
E 15:59:10 Failed to Write Image!
I 15:59:10 Exporting Graph Data...
I 15:59:10 Graph Data File: C:\Users\Ken\AppData\Roaming\ImgBurn\Graph Data Files\PLEXTOR_DVDR_PX-L890SA_1.07_SATURDAY-AUGUST-04-2012_3-49_PM_97m26s66f_16x.ibg
I 15:59:10 Export Successfully Completed!
E 15:59:10 Operation Aborted! - Duration: 00:09:28
I 15:59:10 Average Write Rate: 653 KB/s (3.8x) - Maximum Write Rate: 2,790 KB/s (16.2x)