Vitesse de gravure de CD

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Autor: Frédéric
Data:  
A: ML Guilde
Assumpte: Vitesse de gravure de CD
Je viens de constater un truc bizarre : le graveur de CD de mon portable
peut graver en vitesse 10x. Or j'ai des CD qui supportent une vitesse de
52x qui ne sont gravés qu'en 4x. A quoi est-ce dû ? J'ai d'autres marques
de CD qui sont très bien passés en 10x...

Voici la sortie de cdrecord sur les disques qui posent problème
(duplication de CD que mes gamins ont eu à Noël, pour éviter qu'ils les
flinguent tout de suite !) :

Calling: /usr/lib/xcdroast/bin/xcdrwrap CDRECORD dev= "ATAPI:0,1,0"
gracetime=2 fs=4096k driveropts=burnfree -v -useinfo speed=24 -dao -eject
-pad -audio "/tmp/track-01.wav" ...

cdrecord: Warning: Running on Linux-2.6.14-2-686
cdrecord: There are unsettled issues with Linux-2.5 and newer.
cdrecord: If you have unexpected problems, please try Linux-2.4 or Solaris.
scsidev: 'ATAPI:0,1,0'
devname: 'ATAPI'
scsibus: 0 target: 1 lun: 0
Warning: Using ATA Packet interface.
Warning: The related Linux kernel interface code seems to be unmaintained.
Warning: There is absolutely NO DMA, operations thus are slow.
cdrecord: Warning: using inofficial version of libscg (ubuntu-0.8ubuntu1 
'@(#)scsitransp.c    1.91 04/06/17 Copyright 1988,1995,2000-2004 J. 
Schilling').
SCSI buffer size: 64512
cdrecord: Asked for SCSI I/O buffer size 64512 bytes, could only get 20480.
Cdrecord-Clone 2.01.01a03 (i686-pc-linux-gnu) Copyright (C) 1995-2005 Joerg 
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@???>.
The original author should not be bothered with problems of this version.


TOC Type: 0 = CD-DA
Using libscg version 'ubuntu-0.8ubuntu1'.
Driveropts: 'burnfree'
atapi: 1
Device type    : Removable CD-ROM
Version        : 0
Response Format: 2
Capabilities   :
Vendor_info    : 'HL-DT-ST'
Identifikation : 'RW/DVD GCC-4240N'
Revision       : 'D110'
Device seems to be: Generic mmc2 DVD-ROM.
Current: 0x0009
Profile: 0x0010
Profile: 0x0008
Profile: 0x0009 (current)
Profile: 0x000A
Using generic SCSI-3/mmc   CD-R/CD-RW driver (mmc_cdr).
Driver flags   : MMC-2 SWABAUDIO BURNFREE
Supported modes: TAO PACKET SAO SAO/R96P SAO/R96R RAW/R16 RAW/R96P RAW/R96R
Drive buf size : 1705200 = 1665 KB
FIFO size      : 4194304 = 4096 KB
pregap1: -1
Track 01: audio   14 MB (01:24.34) no preemp
Track 02: audio   14 MB (01:25.08) no preemp
Track 03: audio   19 MB (01:56.65) no preemp
Track 04: audio    9 MB (00:59.37) no preemp
Track 05: audio   17 MB (01:46.69) no preemp
Track 06: audio   12 MB (01:13.62) no preemp
Track 07: audio   20 MB (01:59.38) no preemp
Track 08: audio   18 MB (01:49.04) no preemp
Track 09: audio    9 MB (00:58.45) no preemp
Track 10: audio   16 MB (01:38.24) no preemp
Track 11: audio    9 MB (00:57.49) no preemp
Track 12: audio   17 MB (01:46.94) no preemp
Track 13: audio    7 MB (00:45.92) no preemp
Track 14: audio   12 MB (01:13.70) no preemp
Track 15: audio    9 MB (00:57.25) no preemp
Track 16: audio   18 MB (01:52.29) no preemp
Track 17: audio   18 MB (01:47.84) no preemp
Track 18: audio   15 MB (01:32.00) no preemp
Track 19: audio   18 MB (01:48.54) no preemp
Track 20: audio   15 MB (01:29.41) no preemp
Total size:
296 MB (29:22.30) = 132173 sectors
Lout start:      296 MB (29:24/23) = 132173 sectors
Current Secsize: 2048
ATIP info from disk:
Indicated writing power: 6
Is not unrestricted
Is not erasable
Disk sub type: Medium Type C, low Beta category (C-) (6)
ATIP start of lead in:  -11231 (97:32/19)
ATIP start of lead out: 359846 (79:59/71)
Disk type:    Short strategy type (Phthalocyanine or similar)
Manuf. index: 27
Manufacturer: Prodisc Technology Inc.
Blocks total: 359846 Blocks current: 359846 Blocks remaining: 227673
Starting to write CD/DVD at speed 4 in real SAO mode for single session.
Waiting for reader process to fill input buffer ...
input buffer ready.
BURN-Free is ON.
Performing OPC...
Sending CUE sheet...
Writing pregap for track 1 at -150
Starting new track at sector: 0


Track 01: Total bytes read/written: 14878752/14878752 (6326 sectors).
Starting new track at sector: 6326

Track 02: Total bytes read/written: 15008112/15008112 (6381 sectors).
Starting new track at sector: 12707

...

--
Frédéric

http://www.gbiloba.org