This spring I bought NEC ND6500A and was very happy using it with my IBM T23 running under Win2k using Nero. Well... until today.
When writing DVD-R in multisession mode - got error "No seek complete".
Tried no-multisession mode - got same error.

Any ideas - is that a software problem - or hardware?

Here is the log:

---------------------------------------
Windows 2000 5.0
IA32
WinAspi: File 'Wnaspi32.dll': Ver=4.57 (1008), size=48128 bytes, created 12/23/1997 4:23:24 AM
ahead WinASPI: File 'C:\Program Files\Ahead\Nero\Wnaspi32.dll': Ver=2.0.1.74, size=164112 bytes, created 10/26/2004 6:35:34 PM
Nero Version: 6.6.0.16
Internal Version: 6, 6, 0, 16b

Recorder: <_NEC DVD+-RW ND-6500A> Version: 2.24 - HA 1 TA 0 - 6.6.0.16
Adapter driver: HA 1
Drive buffer : 2048kB
Bus Type : default (0) -> ATAPI, detected: ATAPI
CD-ROM: <_NEC DVD+-RW ND-6500A>Version: 2.24 - HA 1 TA 0 - 6.6.0.16
Adapter driver: HA 1

=== Scsi-Device-Map ===
DiskPeripheral : ST9808211A atapi Port 0 ID 0 DMA: On
CdRomPeripheral : _NEC DVD+-RW ND-6500A atapi Port 1 ID 0 DMA: Off

=== CDRom-Device-Map ===
_NEC DVD+-RW ND-6500A E: CDRom0
=======================

AutoRun : 1
Excluded drive IDs:
WriteBufferSize: 40894464 (0) Byte
ShowDrvBufStat : 0
BUFE : 0
Physical memory : 254MB (261040kB)
Free physical memory: 83MB (85844kB)
Memory in use : 67 %
Uncached PFiles: 0x0
Use Inquiry : 1
Global Bus Type: default (0)
Check supported media : Disabled (0)

11.12.2005
ISO compilation
12:51:46 PM #1 Text 0 File Isodoc.cpp, Line 6356
Iso document burn settings
------------------------------------------
Determine maximum speed : FALSE
Simulate : TRUE
Write : TRUE
Finalize CD : TRUE
Multisession : FALSE
Burning mode : DAO
Mode : 1
ISO Level : 2 (Max. of 31 chars)
Character set : ISO 9660
Joliet : TRUE
Allow pathdepth more than 8 directories : TRUE
Allow more than 255 characters in path : TRUE
Write ISO9660 ;1 file extensions : TRUE

12:51:46 PM #2 Text 0 File Reader.cpp, Line 127
Reader running

12:51:46 PM #3 Text 0 File Writer.cpp, Line 122
Writer _NEC DVD+-RW ND-6500A running

12:51:46 PM #4 ISO9660GEN -11 File geniso.cpp, Line 3309
First writeable address = 0 (0x00000000)

12:51:46 PM #5 Text 0 File Burncd.cpp, Line 3233
Turn on Disc-At-Once, using DVD media

12:51:48 PM #6 Text 0 File DlgWaitCD.cpp, Line 270
Last possible write address on media: 2298495 (510:46.45, 4489MB)
Last address to be written: 1932943 (429:32.43, 3775MB)

12:51:48 PM #7 Text 0 File DlgWaitCD.cpp, Line 282
Write in overburning mode: NO (enabled: CD)

12:51:48 PM #8 Text 0 File DlgWaitCD.cpp, Line 2483
Recorder: _NEC DVD+-RW ND-6500A, Media type: DVD-R
Disc Manufacturer: MCC 02 - RG20
Disc Application Code: 64, Disc Physical Code: 193

12:51:48 PM #9 Text 0 File DlgWaitCD.cpp, Line 448
>>> Protocol of DlgWaitCD activities: <<<
=========================================

12:51:48 PM #10 Text 0 File ThreadedTransferInterface.cpp, Line 838
Setup items (after recorder preparation)
0: TRM_DATA_MODE1 ()
2 indices, index0 (150) not provided
original disc pos #0 + 1932944 (1932944) = #1932944/429:32.44
relocatable, disc pos for caching/writing not required/ required, no patch infos
-> TRM_DATA_MODE1, 2048, config 0, wanted index0 0 blocks, length 1932944 blocks [_NEC DVD+-RW ND-6500A]
--------------------------------------------------------------

12:51:48 PM #11 Text 0 File ThreadedTransferInterface.cpp, Line 1051
Prepare recorder [_NEC DVD+-RW ND-6500A] for write in CUE-sheet-DAO
DAO infos:
==========
MCN: ""
TOCType: 0x00; Session Closed, disc fixated
Tracks 1 to 1:
1: TRM_DATA_MODE1, 2048/0x00, FilePos 0 0 3958669312, ISRC ""
DAO layout:
===========
__Start_|____Track_|_Idx_|_CtrlAdr_|_RecDep__________
0 | lead-in | 0 | 0x41 | 0x00
0 | 1 | 0 | 0x41 | 0x00
0 | 1 | 1 | 0x41 | 0x00
1932944 | lead-out | 1 | 0x41 | 0x00

12:51:48 PM #12 Phase 24 File dlgbrnst.cpp, Line 1832
Caching of files started

12:51:49 PM #13 Text 0 File Burncd.cpp, Line 4120
Cache writing successful.

12:51:49 PM #14 Phase 25 File dlgbrnst.cpp, Line 1832
Caching of files completed

12:51:49 PM #15 Phase 32 File dlgbrnst.cpp, Line 1832
Simulation started at 8x (11,080 KB/s)

12:51:49 PM #16 Text 0 File ThreadedTransferInterface.cpp, Line 2654
Verifying disc position of item 0 (relocatable, disc pos, no patch infos, orig at #0): write at #0

12:51:49 PM #17 Text 0 File DVDR.cpp, Line 2379
Recording mode: Sequential Recording Mode

12:51:49 PM #18 Text 0 File Mmc.cpp, Line 21708
Set BUFE: JustLink -> ON

12:51:50 PM #19 Text 0 File DVDR.cpp, Line 2534
Start write address at LBA 0
DVD high compatibility mode: Yes

12:51:50 PM #20 Text 0 File Cdrdrv.cpp, Line 8862
---- DVD Structure: Physical Format Information (00h) ----
Layer: 0, Address: 0 (0 h), AGID: 0; Length: 2050
Book Type: DVD-ROM (0), Part Version: 0.9x (0)
Disc Size: 120 mm, Maximum Rate: 2,52 Mbps (0 h)
Number of Layers: 1, Track Path: Parallel Track Path (PTP), Layer Type: ?
Linear Density: 0,267 um/bit, Track Density: 0,74 um/track
Starting Physical Sector Number of Data Area: 0 h (?)
End Physical Sector Number of Data Area: 0 h
End Sector Number in Layer 0: 0 h (LBN: FFFD0000 h, 4193920 MB)
Data in Burst Cutting Area (BCA) does not exist
Media Specific [16..63]:
00 00 00 00 00 00 00 00 - 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 - 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 - 00 00 00 00 00 00 00 00 ................

12:51:51 PM #21 Text 0 File Cdrdrv.cpp, Line 1286
12:51:51.616 - _NEC DVD+-RW ND-6500A\H1 T0 : Queue again later

12:53:08 PM #22 SCSI -1093 File Cdrdrv.cpp, Line 1434
SCSI Exec, HA 1, TA 0, LUN 0, buffer 0x07780000
Status: 0x04 (0x01, SCSI_ERR)
HA-Status 0x00 (0x00, OK)
TA-Status 0x02 (0x01, SCSI_TASTATUS_CHKCOND)
Sense Key: 0x03 (KEY_MEDIUM_ERROR)
Sense Code: 0x02
Sense Qual: 0x00
CDB Data: 0x2A 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x20 0x00 0x00 0x00
Sense Data: 0x70 0x00 0x03 0x00 0x00 0x00 0x00 0x0A
0x00 0x00 0x00 0x00 0x02 0x00

12:53:08 PM #23 CDR -1093 File Writer.cpp, Line 311
No seek complete

12:53:08 PM #24 Text 0 File ThreadedTransfer.cpp, Line 228
all writers idle, stopping conversion

12:53:08 PM #25 Text 0 File ThreadedTransfer.cpp, Line 222
conversion idle, stopping reader

12:53:08 PM #26 Text 0 File DVDR.cpp, Line 2774
EndDAO: Last written address was -1

12:53:08 PM #27 Phase 34 File dlgbrnst.cpp, Line 1832
Simulation failed at 8x (11,080 KB/s)


Existing drivers:
File 'Drivers\ASPI32.SYS': Ver=4.57 (1008), size=23936 bytes, created 12/23/1997 5:02:46 AM
File 'Drivers\PXHELP20.SYS': Ver=2.03.28a, size=20640 bytes, created 3/12/2005 1:28:13 AM (Prassi/Veritas driver for win 2K)
File 'Drivers\atapi.sys': Ver=5.00.2195.6699, size=86672 bytes, created 6/19/2003 12:05:04 PM (Adapter driver for rec)

Registry Keys:
HKLM\Software\Microsoft\Windows NT\CurrentVersion\WinLogon\AllocateCDROMs : 0 (Security Option)

DMA is OFF for the drive!!
What media is that you have tried with??

Verbatim DVD-R 8x.

Wrote around 100 DVD-Rs (and several DVD+RW) with the drive and until today had no problems.

First a late welcome strabott.
Do you get same error when burning the same disc?

yes.

For example (from another log):

1:03:46 PM #23 CDR -1093 File Writer.cpp, Line 311
No seek complete

1:03:46 PM #24 Text 0 File ThreadedTransfer.cpp, Line 228
all writers idle, stopping conversion

1:03:46 PM #25 Text 0 File ThreadedTransfer.cpp, Line 222
conversion idle, stopping reader

1:03:46 PM #26 Text 0 File DVDR.cpp, Line 2774
EndDAO: Last written address was -1

1:03:46 PM #27 Phase 34 File dlgbrnst.cpp, Line 1832
Simulation failed at 4x (5,540 KB/s)

Is it a hardware failure?