dvd+rw problems

[Nick Pegg]

On 5/26/06, Nick Pegg <nick.pegg at gmail.com> wrote:
> I'm having some troubles reading and writing DVD+RW discs. I've
> installed dvd+rw-tools and followed the instructions in the FreeBSD
> Handbook and searched Google without much luck. Here's the specific
> errors I'm getting:
>
> Trying to mount the disc:
> server# mount_cd9660 /dev/cd0 /cdrom
> mount_cd9660: /dev/cd0: Invalid argument
>
> Trying to burn stuff to the disc:
> server# growisofs -Z /dev/cd0 -J -R /root/dumps
> :-( unable to cam_open_pass("/dev/pass0",O_RDWR): Operation not permitted
>
>
> When trying the same operations with a DVD-R disc, I can successfully
> mount and read the disc, however I get the same error when trying to
> write to the disc. The drive can also mount and read CD media just
> fine. I've double-checked the permissions in /dev and I'm running
> everything as root, so that shouldn't be a problem.
>
> Here's some additional info to help in figuring out what my problem could be:
>
> server# camcontrol devlist
> <TDK DVDRW0404N 1.0A>              at scbus1 target 1 lun 0 (cd0,pass0)
>
> Here's some relevant stuff from dmesg:
> acd0: CDR <CD-ROM! Erive/G6E ! ! ! ! ! ! ! ! ! ! !/M1/31 !> at
> ata1-master UDMA33
> acd1: DVDR <TDK DVDRW0404N/1.0A> at ata1-slave UDMA33
> (probe0:ata1:0:0:0): INQUIRY. CDB: 12 0 0 0 24 0
> (probe0:ata1:0:0:0): CAM Status: SCSI Status Error
> (probe0:ata1:0:0:0): SCSI Status: Check Condition
> (probe0:ata1:0:0:0): ILLEGAL REQUEST info?:1000100 csi:0,1,0,1 asc:24,1
> (probe0:ata1:0:0:0): Reserved ASC/ASCQ pair
> (probe0:ata1:0:0:0): Unretryable error
> cd0 at ata1 bus 0 target 1 lun 0
> cd0: <TDK DVDRW0404N 1.0A> Removable CD-ROM SCSI-0 device
> cd0: 33.000MB/s transfers
> cd0: Attempt to query device size failed: NOT READY, Medium not present
> g_vfs_done():acd0[READ(offset=65536, length=8192)]error = 5
> g_vfs_done():acd0[READ(offset=32768, length=2048)]error = 5
> g_vfs_done():cd0[READ(offset=65536, length=8192)]error = 5
> (cd0:ata1:0:1:0): READ TOC/PMA/ATIP {MMC Proposed}. CDB: 43 0 0 0 0 0 0 0 4 0
> (cd0:ata1:0:1:0): CAM Status: SCSI Status Error
> (cd0:ata1:0:1:0): SCSI Status: Check Condition
> (cd0:ata1:0:1:0): ILLEGAL REQUEST asc:24,0
> (cd0:ata1:0:1:0): Invalid field in CDB: Command byte 6 is invalid
> (cd0:ata1:0:1:0): Unretryable error
> g_vfs_done():cd0[READ(offset=32768, length=2048)]error = 5
>
>
> Thanks for the help!
>
> -Nick
>

I've got an update to my problem. I can actually read the disc just
fine at securelevel 3, but I need to drop down to securelevel 1 in
order to write to it (/dev/pass0 is a protected device node at
securelevel 2 and 3).

Is there a workaround to this, or will I have to drop into single-user
mode every time I want to write to a DVD?


-Nick