wodim saved my day and wrote the xubuntu 64 bit iso at last

I had problems with burning dvds both with xfburn and with brasero too

One of the errors  was
SCSI error on write(0,16): [3 73 03] Power calibration area error

Another problem was that burn completed the writing in xfburn but when reading and checking the md5 for the dvd

dd bs=1M if=/dev/sr0 of=/tmp/iso


[  349.397899] sr 0:0:1:0: [sr0]  Add. Sense: No seek complete
[  349.397906] sr 0:0:1:0: [sr0] CDB: Read(10): 28 00 00 05 49 df 00 00 01 00
[  349.397925] end_request: I/O error, dev sr0, sector 1386364
[  349.397933] Buffer I/O error on device sr0, logical block 346591
[  373.127873] sr 0:0:1:0: [sr0] Unhandled sense code
[  373.127880] sr 0:0:1:0: [sr0]  Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[  373.127887] sr 0:0:1:0: [sr0]  Sense Key : Medium Error [current]
[  373.127896] Info fld=0x5299c
[  373.127899] sr 0:0:1:0: [sr0]  Add. Sense: No seek complete
[  373.127907] sr 0:0:1:0: [sr0] CDB: Read(10): 28 00 00 05 29 9c 00 00 20 00
[  373.127926] end_request: I/O error, dev sr0, sector 1353328
[  373.127933] Buffer I/O error on device sr0, logical block 338332
[  373.127939] Buffer I/O error on device sr0, logical block 338333
[  373.127954] Buffer I/O error on device sr0, logical block 338334
[  373.127957] Buffer I/O error on device sr0, logical block 338335
[  373.127961] Buffer I/O error on device sr0, logical block 338336
[  373.127964] Buffer I/O error on device sr0, logical block 338337
[  373.127967] Buffer I/O error on device sr0, logical block 338338
[  373.127970] Buffer I/O error on device sr0, logical block 338339
[  373.127974] Buffer I/O error on device sr0, logical block 338340
[  373.127977] Buffer I/O error on device sr0, logical block 338341
[  379.137046] sr 0:0:1:0: [sr0] Unhandled sense code
[  379.137053] sr 0:0:1:0: [sr0]  Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[  379.137060] sr 0:0:1:0: [sr0]  Sense Key : Medium Error [current]
[  379.137069] Info fld=0x5299c



and it damaged every dvd i have throwed to it

Solution was to use the command line tools (saw it on a forum or in a bug tracker )



wodim -v dev=/dev/sr0 speed=4 xubuntu-11.10-desktop-amd64.iso
wodim: No write mode specified.
wodim: Assuming -tao mode.
wodim: Future versions of wodim may have different drive dependent defaults.
TOC Type: 1 = CD-ROM
scsidev: '/dev/sr0'
devname: '/dev/sr0'
scsibus: -2 target: -2 lun: -2
Linux sg driver version: 3.5.27
Wodim version: 1.1.11
SCSI buffer size: 64512
Device type    : Removable CD-ROM
Version        : 5
Response Format: 2
Capabilities   :
Vendor_info    : 'Optiarc '
Identification : 'DVD RW AD-7200A '
Revision       : '1.06'
Device seems to be: Generic mmc2 DVD-R/DVD-RW.
Current: 0x001B (DVD+R)
Profile: 0x002B (DVD+R/DL)
Profile: 0x001B (DVD+R) (current)
Profile: 0x001A (DVD+RW)
Profile: 0x0016 (DVD-R/DL layer jump recording)
Profile: 0x0015 (DVD-R/DL sequential recording)
Profile: 0x0014 (DVD-RW sequential recording)
Profile: 0x0013 (DVD-RW restricted overwrite)
Profile: 0x0012 (DVD-RAM)
Profile: 0x0011 (DVD-R sequential recording)
Profile: 0x0010 (DVD-ROM)
Profile: 0x000A (CD-RW)
Profile: 0x0009 (CD-R)
Profile: 0x0008 (CD-ROM)
Profile: 0x0002 (Removable disk)
Using generic SCSI-3/mmc DVD-R(W) driver (mmc_mdvd).
Driver flags   : SWABAUDIO BURNFREE
Supported modes: PACKET SAO
Drive buf size : 1310720 = 1280 KB
Beginning DMA speed test. Set CDR_NODMATEST environment variable if device
communication breaks or freezes immediately after that.
FIFO size      : 12582912 = 12288 KB
Track 01: data   693 MB      
Total size:      796 MB (78:52.88) = 354966 sectors
Lout start:      796 MB (78:54/66) = 354966 sectors
Current Secsize: 2048
HINT: use dvd+rw-mediainfo from dvd+rw-tools for information extraction.
Blocks total: 2295104 Blocks current: 2295104 Blocks remaining: 1940138
Speed set to 5540 KB/s
Starting to write CD/DVD at speed   4.0 in real unknown mode for single session.
Last chance to quit, starting real write in    0 seconds. Operation starts.
Waiting for reader process to fill input buffer ... input buffer ready.
Performing OPC...
Starting new track at sector: 0
Track 01:    1 of  693 MB written (fifo  97%) [buf  62%]   0.5x.

after that everything went fine


dd bs=1M if=/dev/sr0 of=/tmp/iso
693+1 records in
693+1 records out
726990848 bytes (727 MB) copied, 139.896 s, 5.2 MB/s