-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Monday, 21 October 2002 1:25, you wrote:
Good day Carl,
If your drive supports reading the disk atip you can get cdrecord to tell you the indicated writing speed for the disk in the drive.
cdrecord dev=<whatever> -atip
It worked. Thank you Johnny. I'm writing one now. I traded the high=speed CDRW's for slow ones and get this: # cdrecord dev=0,0 -atip Cdrecord 1.11a28 (i686-suse-linux) Copyright (C) 1995-2002 Jörg Schilling scsidev: '0,0' scsibus: 0 target: 0 lun: 0 Linux sg driver version: 3.1.23 Using libscg version 'schily-0.6' Device type : Removable CD-ROM Version : 0 Response Format: 1 Vendor_info : 'SONY ' Identifikation : 'CD-RW CRX700E ' Revision : '1.6r' Device seems to be: Generic mmc CD-RW. Using generic SCSI-3/mmc CD-R driver (mmc_cdr). Driver flags : SWABAUDIO Supported modes: TAO PACKET SAO SAO/R96R RAW/R96R ATIP info from disk: Indicated writing power: 5 Reference speed: 2 Is not unrestricted Is erasable ATIP start of lead in: -11635 (97:26/65) ATIP start of lead out: 359849 (79:59/74) speed low: 0 speed high: 4 power mult factor: 4 6 recommended erase/write power: 3 A2 values: 4A C8 36 Disk type: Phase change Manuf. index: 3 Manufacturer: CMC Magnetics Corporation # - - Does this mean the media speed is 2, or the drive speed is 2? - - Is there a place to find driver specific to a Sony drive, and will a correct driver give higher speed? - - "Is not unrestricted" WTF? -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (GNU/Linux) Comment: For info see http://www.gnupg.org iEYEARECAAYFAj21bmUACgkQnQ18+PFcZJu9FQCeONFYk8sFeMFQIl8laOzerS5u EBsAnRScnmfHejVEOV33lhLMvT3UocxO =QG4c -----END PGP SIGNATURE-----
Good day Carl,
- - Does this mean the media speed is 2, or the drive speed is 2? - - Is there a place to find driver specific to a Sony drive, and will a correct driver give higher speed? - - "Is not unrestricted" WTF?
Now you are asking questions I can not answer. I do not know what "Is not unrestricted" means. Whatever is listed under the ATIP section, I think relates entirely to the disk. My drive should be capable of rewiting CD-RW disks at 10x. It says so on the front. But the ATIP still lists this mysterious "Reference speed: 2". I do not know what it is. Your drive can not burn any faster than what it says on the drive's front. It's a physical limitation that I beleive no driver will be able to do anything about. I do not know where to find device specific drivers. I just use the builtins. It works fine for me. In general, just tell the CD burner app to burn at the recommended speed listed in the ATIP. Unless the drive is not that fast of course. In that case just burn at the drive's max speed. Anyways, I am puzzled that you got it to work just by trading high speed disks for low speed ones. As far as I know (and that is far from everything) you should be able to burn any disk at 1x. CD-Rs, based on light sensitive cyanine, would probably "overburn" at 1x if the cyanine was designed for high speed, since it would receive too much light from the laser for too long a period. But it should burn. CD-RWs use heat to alter the phase change in some polymer I think, so I would guess that the slower the speed the more time a given spot would get to change its phase into somthing that clearly resembles either 0 or 1. But it should burn. Anyone out there capable of kicking in with some answers? Best regards :o) Johnny :o)
participants (2)
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Carl -
Johnny Ernst Nielsen