Adaptador ide a usb para usar unidad dvd externa

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Hola soy nuevo en ubuntu. Me ha ido muy bien configurandolo pero tengo un único problema. Mi unidad grabadora dvd es ide pero la conecto al portatil con un adaptador usb-ide alimentado con adaptador de corriente independiente. El portatil la reconoce y lee pero voy a grabar archivos y saca error expulsando el cd. Alguien me dijo que es cuestión de un controlador. He intentado por lado del dma pero nada. Agradecería si alguien me puede ayudar.
Este es el informe de error

Devices
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HL-DT-ST DVDRAM GSA-4163B A102 (/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-RAM, 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]

K3b::IsoImager
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mkisofs print size result: 4349 (8906752 bytes)

System
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K3b Version: 1.91.0
KDE Version: 4.4.2 (KDE 4.4.2)
QT Version: 4.6.2
Kernel: 2.6.32-22-generic

Used versions
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mkisofs: 1.1.10
cdrecord: 1.1.10

cdrecord
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/usr/bin/wodim: Operation not permitted. Warning: Cannot raise RLIMIT_MEMLOCK limits.
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: 3 = CD-ROM XA mode 2
Driveropts: 'burnfree'
Device type : Removable CD-ROM
Version : 0
Response Format: 2
Capabilities :
Vendor_info : 'HL-DT-ST'
Identification : 'DVDRAM GSA-4163B'
Revision : 'A102'
Device seems to be: Generic mmc2 DVD-R/DVD-RW.
Current: 0x000A (CD-RW)
Profile: 0x0012 (DVD-RAM)
Profile: 0x0011 (DVD-R sequential recording)
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) (current)
Profile: 0x0008 (CD-ROM)
Profile: 0x0002 (Removable disk)
Using generic SCSI-3/mmc CD-R/CD-RW driver (mmc_cdr).
Driver flags : MMC-3 SWABAUDIO BURNFREE
Supported modes: TAO PACKET SAO SAO/R96P SAO/R96R RAW/R16 RAW/R96P RAW/R96R
Drive buf size : 1053696 = 1029 KB
Drive DMA Speed: 2694 kB/s 15x CD 1x DVD
FIFO size : 12582912 = 12288 KB
Speed set to 1764 KB/s
Track 01: data 8 MB
Total size: 9 MB (00:58.01) = 4351 sectors
Lout start: 10 MB (01:00/01) = 4351 sectors
Current Secsize: 2048
ATIP info from disk:
Indicated writing power: 3
Reference speed: 6
Is not unrestricted
Is erasable
Disk sub type: High speed Rewritable (CAV) media (1)
ATIP start of lead in: -11635 (97:26/65)
ATIP start of lead out: 359849 (79:59/74)
1T speed low: 4 1T speed high: 10
2T speed low: 4 2T speed high: 0 (reserved val 6)
power mult factor: 1 5
recommended erase/write power: 3
A1 values: 24 1A BC
A2 values: 26 B2 26
Disk type: Phase change
Manuf. index: 3
Manufacturer: CMC Magnetics Corporation
Blocks total: 359849 Blocks current: 359849 Blocks remaining: 355498
Starting to write CD/DVD at speed 10.0 in real TAO mode for multi 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...
Errno: 5 (Input/output error), send opc scsi sendcmd: cmd timeout after 0.003 (60) s
CDB: 54 01 00 00 00 00 00 00 00 00
cmd finished after 0.003s timeout 60s
/usr/bin/wodim: OPC failed.
Writing time: 0.064s
/usr/bin/wodim: fifo had 141 puts and 0 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=10 -tao driveropts=burnfree -multi -xa -tsize=4349s -

mkisofs
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4349
I: -input-charset not specified, using utf-8 (detected in locale settings)
11.75% done, estimate finish Thu May 27 21:56:40 2010
23.15% done, estimate finish Thu May 27 21:56:40 2010
34.56% done, estimate finish Thu May 27 21:56:40 2010
46.33% done, estimate finish Thu May 27 21:56:40 2010
57.74% done, estimate finish Thu May 27 21:56:40 2010
69.14% done, estimate finish Thu May 27 21:56:40 2010
80.55% done, estimate finish Thu May 27 21:56:40 2010
92.32% done, estimate finish Thu May 27 21:56:40 2010
Total translation table size: 0
Total rockridge attributes bytes: 254
Total directory bytes: 372
Path table size(bytes): 10
Max brk space used 0
4349 extents written (8 MB)

mkisofs calculate size command:
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/usr/bin/genisoimage -gui -graft-points -print-size -quiet -volid Ardora5_2 -volset -appid K3B THE CD KREATOR (C) 1998-2010 SEBASTIAN TRUEG AND MICHAL MALEK -publisher -preparer -sysid LINUX -volset-size 1 -volset-seqno 1 -sort /tmp/kde-jorge/k3bpm3504.tmp -rational-rock -hide-list /tmp/kde-jorge/k3bZS3504.tmp -joliet -joliet-long -hide-joliet-list /tmp/kde-jorge/k3bQN3504.tmp -no-cache-inodes -full-iso9660-filenames -iso-level 3 -path-list /tmp/kde-jorge/k3bGS3504.tmp

mkisofs command:
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/usr/bin/genisoimage -gui -graft-points -volid Ardora5_2 -volset -appid K3B THE CD KREATOR (C) 1998-2010 SEBASTIAN TRUEG AND MICHAL MALEK -publisher -preparer -sysid LINUX -volset-size 1 -volset-seqno 1 -sort /tmp/kde-jorge/k3bgs3504.tmp -rational-rock -hide-list /tmp/kde-jorge/k3byi3504.tmp -joliet -joliet-long -hide-joliet-list /tmp/kde-jorge/k3bMo3504.tmp -no-cache-inodes -full-iso9660-filenames -iso-level 3 -path-list /tmp/kde-jorge/k3bfk3504.tmp