Re: Unable to write reliably CD-RW's!
Mike McCarty wrote:
.....
Are you using previously written CDROMs? There is apparently a problem
with erasure of previously recorded CDROMs and cdrecord, which I saw
discussed on Fedora Core List. IIRC, cdrecord allows one to erase and
do some writing with on command, but this fails. If one does the erase
command separately, then it succeeds. If this sounds like it might
be part of the problem, then I suggest trying a writable but not
R/W and trying that.
....
Hoi Mike & Vegard,
I've indeed used rewritable CD's (CD-RW's)! But it doesn't matter
whether they are brand-new or used, the result remains very
unpredictable! The laser must be active; the part of the disk that has
been used can clearly be distinguished! Also a complete blanking
(blank=all) of the entire disk yields a perfect undisturbed surface, but
the disk remains useless.
Let me give you the output of some typical runs:
$ cdrecord -scanbus
Cdrecord-Clone 2.01.01a01 (i686-pc-linux-gnu) Copyright (C) 1995-2004
J?rg Schilling
NOTE: this version of cdrecord is an inofficial (modified) release of
cdrecord
and thus may have bugs that are not present in the original version.
Please send bug reports and support requests to
<cdrtools@packages.debian.org>.
The original author should not be bothered with problems of this version.
Using libscg version 'schily-0.8'.
scsibus0:
0,0,0 0) 'LITE-ON ' 'LTR-24102B ' '5S0D' Removable CD-ROM
0,1,0 1) *
0,2,0 2) *
0,3,0 3) *
0,4,0 4) *
0,5,0 5) *
0,6,0 6) *
0,7,0 7) *
Seems allright doesn't it?!
Generating the iso-file:
$ mkisofs -v -r -J -o test.iso /home/verhaag/tobewritten
INFO: ISO-8859-1 character encoding detected by locale settings.
Assuming ISO-8859-1 encoded filenames on source filesystem,
use -input-charset to override.
mkisofs 2.01-unofficial-iconv (i686-pc-linux-gnu)
Scanning /home/verhaag/tobewritten
....... [left this part out]
Writing: Initial Padblock Start Block 0
Done with: Initial Padblock Block(s) 16
Writing: Primary Volume Descriptor Start Block 16
Done with: Primary Volume Descriptor Block(s) 1
Writing: Joliet Volume Descriptor Start Block 17
Done with: Joliet Volume Descriptor Block(s) 1
Writing: End Volume Descriptor Start Block 18
Done with: End Volume Descriptor Block(s) 1
Writing: Version block Start Block 19
Done with: Version block Block(s) 1
Writing: Path table Start Block 20
Done with: Path table Block(s) 4
Writing: Joliet path table Start Block 24
Done with: Joliet path table Block(s) 4
Writing: Directory tree Start Block 28
Done with: Directory tree Block(s) 9
Writing: Joliet directory tree Start Block 37
Done with: Joliet directory tree Block(s) 6
Writing: Directory tree cleanup Start Block 43
Done with: Directory tree cleanup Block(s) 0
Writing: Extension record Start Block 43
Done with: Extension record Block(s) 1
Writing: The File(s) Start Block 44
18.25% done, estimate finish Wed Apr 5 20:43:06 2006
36.44% done, estimate finish Wed Apr 5 20:43:06 2006
54.67% done, estimate finish Wed Apr 5 20:43:07 2006
72.91% done, estimate finish Wed Apr 5 20:43:07 2006
91.13% done, estimate finish Wed Apr 5 20:43:07 2006
Total translation table size: 0
Total rockridge attributes bytes: 9114
Total directory bytes: 16384
Path table size(bytes): 54
Done with: The File(s) Block(s) 27254
Writing: Ending Padblock Start Block 27298
Done with: Ending Padblock Block(s) 150
Max brk space used 21000
27448 extents written (53 MB)
$
Okay I'd say!
The actual burn:
$ cdrecord -v test.iso
cdrecord: No write mode specified.
cdrecord: Asuming -tao mode.
cdrecord: Future versions of cdrecord may have different drive dependent
defaults.
cdrecord: Continuing in 5 seconds...
Cdrecord-Clone 2.01.01a01 (i686-pc-linux-gnu) Copyright (C) 1995-2004
J?rg Schilling
NOTE: this version of cdrecord is an inofficial (modified) release of
cdrecord
and thus may have bugs that are not present in the original version.
Please send bug reports and support requests to
<cdrtools@packages.debian.org>.
The original author should not be bothered with problems of this version.
TOC Type: 1 = CD-ROM
scsidev: '0,0,0'
scsibus: 0 target: 0 lun: 0
Linux sg driver version: 3.1.25
Using libscg version 'schily-0.8'.
SCSI buffer size: 64512
atapi: 1
Device type : Removable CD-ROM
Version : 0
Response Format: 2
Capabilities :
Vendor_info : 'LITE-ON '
Identifikation : 'LTR-24102B '
Revision : '5S0D'
Device seems to be: Generic mmc CD-RW.
Current: 0x000A
Profile: 0x000A (current)
Profile: 0x0009
Profile: 0x0008
Profile: 0x0002 (current)
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 : 1966272 = 1920 KB
Drive DMA Speed: 5032 kB/s 28x CD 3x DVD
FIFO size : 4194304 = 4096 KB
Track 01: data 53 MB
Total size: 61 MB (06:06.00) = 27450 sectors
Lout start: 61 MB (06:08/00) = 27450 sectors
Current Secsize: 2048
ATIP info from disk:
Indicated writing power: 5
Reference speed: 2
Is not unrestricted
Is erasable
ATIP start of lead in: -11745 (97:25/30)
ATIP start of lead out: 359849 (79:59/74)
1T speed low: 0 (reserved val 0) 1T speed high: 4
2T speed low: 0 (reserved val 5) 2T speed high: 0 (reserved val 12)
power mult factor: 4 6
recommended erase/write power: 3
A1 values: 02 4C B0
A2 values: 5C D8 36
Disk type: Phase change
Manuf. index: 40
Manufacturer: INFODISC Technology Co., Ltd.
Blocks total: 359849 Blocks current: 359849 Blocks remaining: 332399
Starting to write CD/DVD at speed 4 in real TAO mode for single session.
Last chance to quit, starting real write 0 seconds. Operation starts.
Waiting for reader process to fill input buffer ... input buffer ready.
BURN-Free is OFF.
Performing OPC...
Starting new track at sector: 0
Track 01: 53 of 53 MB written (fifo 100%) [buf 100%] 4.0x.
Track 01: Total bytes read/written: 56213504/56213504 (27448 sectors).
Writing time: 103.225s
Average write speed 3.9x.
Min drive buffer fill was 100%
Fixating...
Fixating time: 80.063s
cdrecord: fifo had 886 puts and 886 gets.
cdrecord: fifo was 0 times empty and 799 times full, min fill was 82%.
$
Nothing wrong!? I've also tried with the speed set to 2, but doesn't help!
First basic check:
$ isoinfo -d -i /dev/scd0
isoinfo: Input/output error. Read error on old image
$
The result is that the disk can not be mounted!
In case one notes some abnormalities in the above given output, please
let me know!
My next test will be to use a new CD-R disk,and carry out the same steps
as mentioned above. I'll keep you posted, okay!
Gerard
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