I run NERO 4.50 scan disc and I get:

"100% GOOD" (green) A few scattered yellow boxes are visible (this or 99.9% is typical of my scan disc results.)

In the "file" box at the bottom, it shows:

"Title 2 Chapter 1 = 47% Quality"

All other files = 100%

Read Test speed 4x    Speed 3.96x

when I try to run "Benchmark" I get the following message:

Error! NO ADDITIONAL SENSE INFORMATION (000000)

These are the logs from my last 2 burn attempts of the same disc (star trek next gen season 6 disc 2)

3/25/2006 8:20:26 PM	info	Media removed. Burning layer not ready to write
3/25/2006 8:20:24 PM	info	Finalization Time 00:01:22 - Total completion time 00:29:49
3/25/2006 8:19:01 PM	info	Write finished in 00:28:26 - Finalization start here. Avg. burn rate 2.18
3/25/2006 7:50:43 PM	info	Lead-in burning time (mS) 8254
3/25/2006 7:50:34 PM	info	Write started 2290128 sectors to write
3/25/2006 7:50:34 PM	info	Init success: DVD-R SAO
3/25/2006 7:50:34 PM	info	Writing speed requested x2.0, effective x2.0
3/25/2006 7:50:34 PM	info	Available write speed: x8.0, x4.0, x2.0
3/25/2006 7:50:34 PM	info	Media ID: TYG02
3/25/2006 7:50:34 PM	info	DMA Enabled
3/25/2006 7:50:34 PM	info	Creating image cache file "C:\Documents and Settings\Valued Customer\Application Data\VSO_HWE\HWE_060325195034031.CACHE"
3/25/2006 7:50:34 PM	info	Scanned files #15, folder #2 - total size 4689061888 b. (4.37 Gb.)
3/25/2006 7:50:34 PM	info	Inserted media type : DVD-R
3/25/2006 7:50:34 PM	info	Write started
3/25/2006 7:50:18 PM	info	New media inserted. Burning layer is ready to write
3/25/2006 7:24:26 PM	info	Media removed. Burning layer not ready to write
3/25/2006 7:24:24 PM	info	Finalization Time 00:00:45 - Total completion time 00:11:07
3/25/2006 7:23:38 PM	info	Write finished in 00:10:21 - Finalization start here. Avg. burn rate 5.98
3/25/2006 7:13:32 PM	info	Lead-in burning time (mS) 16068
3/25/2006 7:13:16 PM	info	Write started 2290128 sectors to write
3/25/2006 7:13:16 PM	info	Init success: DVD-R SAO
3/25/2006 7:13:16 PM	info	Writing speed requested x8.0, effective x3.0
3/25/2006 7:13:16 PM	info	Available write speed: x8.0, x4.0, x2.0
3/25/2006 7:13:16 PM	info	Media ID: TYG02
3/25/2006 7:13:16 PM	info	DMA Enabled
3/25/2006 7:13:16 PM	info	Creating image cache file "C:\Documents and Settings\Valued Customer\Application Data\VSO_HWE\HWE_060325191316000.CACHE"
3/25/2006 7:13:15 PM	info	Scanned files #15, folder #2 - total size 4689061888 b. (4.37 Gb.)
3/25/2006 7:13:15 PM	info	Inserted media type : DVD-R
3/25/2006 7:13:15 PM	info	Write started
3/25/2006 7:12:27 PM	info	New media inserted. Burning layer is ready to write
3/25/2006 6:42:06 PM	info	Compatible media types : DVD-R, DVD-RW Seq., DVD-RW RO, DVD+R, DVD+RW, CD-R, CD-RW, DL DVD+R
3/25/2006 6:42:06 PM	info	New Drive selected : 1:0:0 - TSSTcorp CD/DVDW TS-L532R HA05 [D] (Ide)
3/25/2006 6:40:44 PM	info	Current Drive selected : 1:0:0 - TSSTcorp CD/DVDW TS-L532R HA05 [D] (Ide)
3/25/2006 6:40:44 PM	info	Using Patin-Couffin driver Version 1.35, Internal revision 35 - Async. Access mode
3/25/2006 6:40:44 PM	info	User default language : 1033 (0x0409h) - English (United States)
3/25/2006 6:40:44 PM	info	System default language : 1033 (0x0409h) - English (United States)
3/25/2006 6:40:44 PM	info	DLL Version 2.0.16.252
3/25/2006 6:40:44 PM	info	DLL C:\Program Files\DVDFab Express\vso_hwe.dll
3/25/2006 6:40:44 PM	info	Version 2, 9, 7, 21
3/25/2006 6:40:44 PM	info	ExeName : "C:\Program Files\DVDFab Express\DVDFabExpress.exe"
3/25/2006 6:40:44 PM	info	OS : Microsoft Windows XP Professional Service Pack 2 (Build 2600)
3/25/2006 6:40:44 PM	info	******************** Report session started ********************
3/25/2006 8:20:26 PM	info	Media removed. Burning layer not ready to write
3/25/2006 8:20:24 PM	info	Finalization Time 00:01:22 - Total completion time 00:29:49
3/25/2006 8:19:01 PM	info	Write finished in 00:28:26 - Finalization start here. Avg. burn rate 2.18
3/25/2006 7:50:43 PM	info	Lead-in burning time (mS) 8254
3/25/2006 7:50:34 PM	info	Write started 2290128 sectors to write
3/25/2006 7:50:34 PM	info	Init success: DVD-R SAO
3/25/2006 7:50:34 PM	info	Writing speed requested x2.0, effective x2.0
3/25/2006 7:50:34 PM	info	Available write speed: x8.0, x4.0, x2.0
3/25/2006 7:50:34 PM	info	Media ID: TYG02
3/25/2006 7:50:34 PM	info	DMA Enabled
3/25/2006 7:50:34 PM	info	Creating image cache file "C:\Documents and Settings\Valued Customer\Application Data\VSO_HWE\HWE_060325195034031.CACHE"
3/25/2006 7:50:34 PM	info	Scanned files #15, folder #2 - total size 4689061888 b. (4.37 Gb.)
3/25/2006 7:50:34 PM	info	Inserted media type : DVD-R
3/25/2006 7:50:34 PM	info	Write started
3/25/2006 7:50:18 PM	info	New media inserted. Burning layer is ready to write
3/25/2006 7:24:26 PM	info	Media removed. Burning layer not ready to write
3/25/2006 7:24:24 PM	info	Finalization Time 00:00:45 - Total completion time 00:11:07
3/25/2006 7:23:38 PM	info	Write finished in 00:10:21 - Finalization start here. Avg. burn rate 5.98
3/25/2006 7:13:32 PM	info	Lead-in burning time (mS) 16068
3/25/2006 7:13:16 PM	info	Write started 2290128 sectors to write
3/25/2006 7:13:16 PM	info	Init success: DVD-R SAO
3/25/2006 7:13:16 PM	info	Writing speed requested x8.0, effective x3.0
3/25/2006 7:13:16 PM	info	Available write speed: x8.0, x4.0, x2.0
3/25/2006 7:13:16 PM	info	Media ID: TYG02
3/25/2006 7:13:16 PM	info	DMA Enabled
3/25/2006 7:13:16 PM	info	Creating image cache file "C:\Documents and Settings\Valued Customer\Application Data\VSO_HWE\HWE_060325191316000.CACHE"
3/25/2006 7:13:15 PM	info	Scanned files #15, folder #2 - total size 4689061888 b. (4.37 Gb.)
3/25/2006 7:13:15 PM	info	Inserted media type : DVD-R
3/25/2006 7:13:15 PM	info	Write started
3/25/2006 7:12:27 PM	info	New media inserted. Burning layer is ready to write
3/25/2006 6:42:06 PM	info	Compatible media types : DVD-R, DVD-RW Seq., DVD-RW RO, DVD+R, DVD+RW, CD-R, CD-RW, DL DVD+R
3/25/2006 6:42:06 PM	info	New Drive selected : 1:0:0 - TSSTcorp CD/DVDW TS-L532R HA05 [D] (Ide)
3/25/2006 6:40:44 PM	info	Current Drive selected : 1:0:0 - TSSTcorp CD/DVDW TS-L532R HA05 [D] (Ide)
3/25/2006 6:40:44 PM	info	Using Patin-Couffin driver Version 1.35, Internal revision 35 - Async. Access mode
3/25/2006 6:40:44 PM	info	User default language : 1033 (0x0409h) - English (United States)
3/25/2006 6:40:44 PM	info	System default language : 1033 (0x0409h) - English (United States)
3/25/2006 6:40:44 PM	info	DLL Version 2.0.16.252
3/25/2006 6:40:44 PM	info	DLL C:\Program Files\DVDFab Express\vso_hwe.dll
3/25/2006 6:40:44 PM	info	Version 2, 9, 7, 21
3/25/2006 6:40:44 PM	info	ExeName : "C:\Program Files\DVDFab Express\DVDFabExpress.exe"
3/25/2006 6:40:44 PM	info	OS : Microsoft Windows XP Professional Service Pack 2 (Build 2600)
3/25/2006 6:40:44 PM	info	******************** Report session sta