Hello again,

Sorry the previous log was incorrect (i have canceled the burn process). The one I always get is :

Devices
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HL-DT-ST DVD-RW GCA-4080N 0G34 (/dev/sr0, CD-R, CD-RW, CD-ROM, DVD-ROM, DVD-R, DVD-RW, DVD+R, DVD+RW, DVD+R DL) [DVD-ROM, DVD-R Sequential, DVD-RW Restricted Overwrite, DVD-RW Sequential, DVD+RW, DVD+R, DVD+R Dual Layer, CD-ROM, CD-R, CD-RW] [SAO, TAO, RAW, SAO/R96P, SAO/R96R, RAW/R16, RAW/R96P, RAW/R96R, Restricted Overwrite] [%7]

System
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K3b Version: 2.0.1
KDE Version: 4.5.1 (KDE 4.5.1)
QT Version:  4.7.0
Kernel:      2.6.35-22-generic

Used versions
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cdrecord: 1.1.10

cdrecord
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scsidev: '/dev/sr0'
devname: '/dev/sr0'
scsibus: -2 target: -2 lun: -2
Linux sg driver version: 3.5.27
Wodim version: 1.1.10
SCSI buffer size: 64512
Beginning DMA speed test. Set CDR_NODMATEST environment variable if device
communication breaks or freezes immediately after that.
TOC Type: 1 = CD-ROM
Driveropts: 'burnfree'
Device type    : Removable CD-ROM
Version        : 5
Response Format: 2
Capabilities   : 
Vendor_info    : 'HL-DT-ST'
Identification : 'DVD-RW GCA-4080N'
Revision       : '0G34'
Device seems to be: Generic mmc2 DVD-R/DVD-RW.
Current: 0x0011 (DVD-R sequential recording)
Profile: 0x0011 (DVD-R sequential recording) (current)
Profile: 0x0014 (DVD-RW sequential recording) 
Profile: 0x0013 (DVD-RW restricted overwrite) 
Profile: 0x001A (DVD+RW) 
Profile: 0x001B (DVD+R) 
Profile: 0x002B (DVD+R/DL) 
Profile: 0x0010 (DVD-ROM) 
Profile: 0x0009 (CD-R) 
Profile: 0x000A (CD-RW) 
Profile: 0x0008 (CD-ROM) 
Using generic SCSI-3/mmc DVD-R(W) driver (mmc_mdvd).
Driver flags   : SWABAUDIO BURNFREE 
Supported modes: PACKET SAO
Drive buf size : 1114112 = 1088 KB
Drive DMA Speed: 13610 kB/s 77x CD 9x DVD
FIFO size      : 12582912 = 12288 KB
Speed set to 11080 KB/s
Track 01: data   195 MB        
Total size:      224 MB (22:14.76) = 100107 sectors
Lout start:      224 MB (22:16/57) = 100107 sectors
Current Secsize: 2048
HINT: use dvd+rw-mediainfo from dvd+rw-tools for information extraction.
Blocks total: 2298496 Blocks current: 2298496 Blocks remaining: 2198389
Starting to write CD/DVD at speed   8.0 in real SAO mode for single session.
Last chance to quit, starting real write in    2 seconds.
   1 seconds.
   0 seconds. Operation starts.
Waiting for reader process to fill input buffer ... input buffer ready.
Performing OPC...
Sending CUE sheet...
Starting new track at sector: 0
Track 01:    0 of  195 MB written.
Errno: 5 (Input/output error), write_g1 scsi sendcmd: no error
CDB:  2A 00 00 00 00 00 00 00 1F 00
status: 0x2 (CHECK CONDITION)
Sense Bytes: 70 00 03 00 00 00 00 10 32 4D 00 0C 0C 00 00 00
Sense Key: 0x3 Medium Error, Segment 0
Sense Code: 0x0C Qual 0x00 (write error) Fru 0x0
Sense flags: Blk 0 (not valid) 
cmd finished after 27.237s timeout 200s
/usr/bin/wodim: A write error occured.
/usr/bin/wodim: Please properly read the error message above.
Errno: 5 (Input/output error), test unit ready scsi sendcmd: no error
CDB:  00 00 00 00 00 00
status: 0x2 (CHECK CONDITION)
Sense Bytes: 71 00 03 00 00 00 00 10 32 4D 00 0C 0C 00 00 00
Sense Key: 0x3 Medium Error, deferred error, Segment 0
Sense Code: 0x0C Qual 0x00 (write error) Fru 0x0
Sense flags: Blk 0 (not valid) 
cmd finished after 0.003s timeout 200s
write track data: error after 0 bytes
Writing  time:   71.720s
Average write speed   4.6x.
Fixating...
Fixating time:    0.009s
/usr/bin/wodim: fifo had 191 puts and 1 gets.
/usr/bin/wodim: fifo was 0 times empty and 0 times full, min fill was 100%.

cdrecord command:
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/usr/bin/wodim -v gracetime=2 dev=/dev/sr0 speed=8 -sao driveropts=burnfree -data -tsize=100107s -

Thanks a lot for your help

Adlene