Re: Problems reading CDRW after writing
Marc Evans <[EMAIL PROTECTED]> wrote: > Thank you for your suggestion. I have managed to get camcontrol to > function, which implies to me that the atapicam module is > functioning. However, I am not succeeding at getting the readcd > command to work: > > # camcontrol devlist >at scbus1 target 1 lun 0 > (cd0,pass0) # camcontrol inquiry cd0 > pass0: Removable CD-ROM SCSI-0 device > pass0: 33.000MB/s transfers > # readcd dev=/dev/cd0 -c2scan Use readcd dev=1,1,0 -c2scan. > readcd: Invalid argument. Open by 'devname' not supported on this OS. > Cannot open SCSI driver. > readcd: For possible targets try 'readcd -scanbus'. > readcd: For possible transport specifiers try 'readcd dev=help'. > # readcd -scanbus > readcd: Error 0. Cannot open SCSI driver. I don't know yet if this is a general readcd problem or just a problem with the ports version, however readcd -scanbus fails here as well. cdrecord -scanbus still works. Fabian -- http://www.fabiankeil.de/ signature.asc Description: PGP signature
Re: Problems reading CDRW after writing
On Wed, 4 Jan 2006 03:37 am, Marc Evans wrote: > Hello - > > I am running FreeBSD 6.0-STABLE as of Dec-15-2005 on a P4 > system. I have a CDRW drive attached, which identifies as > follows: > > acd0: CDRW at ata1-slave UDMA33 > > I wish to use this device to produce CDRW backup disks > periodically. I use the following commands to produce the > backup: > > burncd erase > sleep 2 # needed to avoid READY error > tar czf - ... | burncd data - fixate > > This appears to work fine, from the perspective of the output > of the commands, e.g. I see output like: > > blanking CD - 100 % done > next writeable LBA 0 > writing from stdin > written this track 633420 KB total 633420 KB > fixating CD, please wait.. > > My problem is that attempts to read the data back, always > fail: > > # tar tzf /dev/acd0 > tar: Error opening archive: Error reading '/dev/acd0': > Input/output error # ls -l /dev/*cd* > crw-r- 1 root operator0, 93 Jan 3 10:33 /dev/acd0 > crw-r- 1 root operator0, 127 Dec 30 14:26 > /dev/acd0t01 > > No errors are shown in /var/log/messages. > > I have also tried writing an ISO9660 image and mounting it, > with similar problems at mount time. > > The above said, I am able to create CD-R data disks and mount > them or otherwise use them. I have tried several different > CD-RW media, and played with -s (the media is rated as 12x), > but have observed no changes. > > Can anyone suggest solutions? > This raises a number of questions:- * Can the RW disks you have written be read in some other drive? * Can you read RW disks written somewhere else? A pure shot in the dark -- but I suspect the read on your drive may not be sensitive enough to read RW disks. Of course if it can write them one would expect it is designed to be able to read them -- but it may be out of spec. or have deteriorated since manufacture. Malcolm ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: Problems reading CDRW after writing
Marc Evans <[EMAIL PROTECTED]> wrote: > I am running FreeBSD 6.0-STABLE as of Dec-15-2005 on a P4 system. I > have a CDRW drive attached, which identifies as follows: > > acd0: CDRW at ata1-slave UDMA33 > > I wish to use this device to produce CDRW backup disks periodically. > I use the following commands to produce the backup: > > burncd erase > sleep 2 # needed to avoid READY error > tar czf - ... | burncd data - fixate > > This appears to work fine, from the perspective of the output of the > commands, e.g. I see output like: > > blanking CD - 100 % done > next writeable LBA 0 > writing from stdin > written this track 633420 KB total 633420 KB > fixating CD, please wait.. > I have also tried writing an ISO9660 image and mounting it, with > similar problems at mount time. > > The above said, I am able to create CD-R data disks and mount them or > otherwise use them. I have tried several different CD-RW media, and > played with -s (the media is rated as 12x), but have observed no > changes. You could use readcd's c2scan option to check if your CD-RWs are OK. readcd is part of (/usr/ports/sysutils/cdrtools/) if you don't have atapicam in your kernel you have to kldload it. Fabian -- http://www.fabiankeil.de/ signature.asc Description: PGP signature
