I am trying to extract iso-images from CD-ROMs read with a SCSI DVD-ROM drive. This doesn't work too well, however. I get an error message from dd about an input/output error. The drive is /dev/sr0 and the line I try is the following: dd if=/dev/sr0 of=image.iso bs=2048 The drive works perfectly well in every other respect, both as a CD-ROM drive and as a DVD-ROM drive, and the command line above works for me on other systems with a CD-ROM drive, where '/dev/sr0' is replaced with the correct device. One thing I have noticed is that the attributes of the device seem to live their own life. I have tried to set them to user root group disk and set read- and write-rights for the group, but soon after the device is suddenly owned by some other user and group is set to users. What gives? Best regards, David List