[conspire] cd burning giving slight errors
Peter Knaggs
peter.knaggs at gmail.com
Sun Nov 6 18:17:57 PST 2011
Hi All,
Both of the CD-burners on my machine are writing
stuff which is slightly different to what I asked: a few
bytes here and there have the wrong values after the
burn (compared using "cmp -l"). There's no errors from
the burning.
Any ideas what could cause this?
The operating system is Ubuntu 11.04 (natty).
I've written CDs on this machine before using k3b
and they verified OK, and it seems strange that both
burners would start to fail at the same time.
Thanks,
Peter.
$ cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=11.04
DISTRIB_CODENAME=natty
DISTRIB_DESCRIPTION="Ubuntu 11.04"
$ uname -a
Linux velocity 2.6.38-11-generic #50-Ubuntu SMP Mon Sep 12 21:17:25
UTC 2011 x86_64 x86_64 x86_64 GNU/Linux
$ wodim --devices
wodim: Overview of accessible drives (2 found) :
-------------------------------------------------------------------------
0 dev='/dev/scd0' rwrw-- : 'ATAPI' 'iHAS222 8'
1 dev='/dev/scd1' rwrw-- : 'ATAPI' 'DVD C DH52C2S'
-------------------------------------------------------------------------
$ wodim speed=1 -v dev=/dev/scd0 -data ubuntu-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/scd0'
devname: '/dev/scd0'
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 : 'ATAPI '
Identification : 'iHAS222 8 '
Revision : '4L01'
Device seems to be: Generic mmc2 DVD-R/DVD-RW.
Current: 0x0009 (CD-R)
Profile: 0x002B (DVD+R/DL)
Profile: 0x001B (DVD+R)
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) (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 FORCESPEED
Supported modes: TAO PACKET SAO SAO/R96P SAO/R96R RAW/R16 RAW/R96P RAW/R96R
Drive buf size : 1867008 = 1823 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 697 MB
Total size: 800 MB (79:20.21) = 357016 sectors
Lout start: 801 MB (79:22/16) = 357016 sectors
Current Secsize: 2048
ATIP info from disk:
Indicated writing power: 5
Is not unrestricted
Is not erasable
Disk sub type: Medium Type B, low Beta category (B-) (4)
ATIP start of lead in: -12369 (97:17/06)
ATIP start of lead out: 359849 (79:59/74)
Disk type: Short strategy type (Phthalocyanine or similar)
Manuf. index: 69
Manufacturer: Moser Baer India Limited
Manufacturer is guessed because of the orange forum embargo.
The orange forum likes to get money for recent information.
The information for this media may not be correct.
Blocks total: 359849 Blocks current: 359849 Blocks remaining: 2833
Forcespeed is OFF.
Speed set to 1412 KB/s
Starting to write CD/DVD at speed 8.0 in real TAO 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: 697 of 697 MB written (fifo 100%) [buf 100%] 8.4x.
Track 01: Total bytes read/written: 731164672/731164672 (357014 sectors).
Writing time: 598.999s
Average write speed 8.0x.
Min drive buffer fill was 99%
Fixating...
Fixating time: 39.719s
BURN-Free was never needed.
wodim: fifo had 11517 puts and 11517 gets.
wodim: fifo was 0 times empty and 11309 times full, min fill was 95%.
$ readom -v dev=/dev/scd0 f=./testing_read
scsidev: '/dev/scd0'
devname: '/dev/scd0'
scsibus: -2 target: -2 lun: -2
Linux sg driver version: 3.5.27
Read speed: 8468 kB/s (CD 48x, DVD 6x).
Write speed: 8468 kB/s (CD 48x, DVD 6x).
Capacity: 357014 Blocks = 714028 kBytes = 697 MBytes = 731 prMB
Sectorsize: 2048 Bytes
Copy from SCSI (2,0,0) disk to file './testing_read'
end: 357014
addr: 357014 cnt: 22
Time total: 143.180sec
Read 714028.00 kB at 4986.9 kB/sec.
$ cmp -l testing_read ubuntu-11.10-desktop-amd64.iso
14776952 271 371
15958776 66 276
126001912 251 241
139168502 330 230
201790448 131 130
253641728 173 373
365486456 133 337
417118968 350 353
464745462 34 30
479204336 376 176
479204352 250 210
491099128 125 124
493947640 342 362
542407664 104 100
554846840 222 220
629814256 340 140
664755200 6 2
682847216 150 170
682847224 42 2
714806272 216 217
Or on a few other burns, the differences were:
$ cmp -l testing_read ubuntu-11.10-desktop-amd64.iso
18775032 20 21
99685366 6 106
227574784 233 223
270672878 374 375
270672894 360 160
305185784 321 361
321367032 247 267
337765360 143 141
569025518 165 127
569025534 257 256
603778048 366 367
651611120 222 22
652893166 312 352
722068480 67 66
$ cmp -l testing_read ubuntu-11.10-desktop-amd64.iso
80493560 12 13
89390064 312 310
140755952 350 310
149490672 165 365
220417022 322 326
230341632 336 332
234007157 71 171
260547568 131 31
263523326 360 362
284498552 67 66
369306616 372 312
381924350 211 201
465279984 230 220
518091760 360 363
519597056 207 205
525816832 263 267
526449016 54 55
530187248 154 174
591408112 354 314
629431288 374 370
649278448 276 256
686959614 70 54
698923640 160 162
698923768 132 112
706345968 114 134
$ cmp -l testing_read ubuntu-11.10-desktop-amd64.iso
44878830 253 257
44878846 16 6
44977134 272 372
46400510 104 4
82830069 343 345
91491320 112 102
101862382 142 140
101862398 141 143
178394096 130 110
201771640 73 71
233347704 260 270
241828848 361 161
241828864 363 367
249025144 41 51
293772272 121 321
293772280 310 350
300210808 171 371
313215608 170 150
313215736 130 134
329863928 353 351
331080312 342 343
372746872 173 73
495936248 167 163
546145272 306 317
570237941 220 20
593537656 151 351
703062776 216 236
724154998 121 21
724155126 14 214
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