After doing some intensiv search through the web, I found out that its not possible to create a dm device for the CD/DVD drive which cryptsetup needs.
echo 0 $(blockdev --getsize /dev/hdc) linear /dev/hdc 0 | dmsetup create hdc This command fails with the following error message: device-mapper: table: 254:5: linear: dm-linear: Device lookup failed device-mapper: ioctl: error adding target to table What works is, creating a loop device with /dev/hdc and mount the loopdevice with cryptsetup. But this does not work with the automatic cryptpassword dialog. -- Crypto CD doesn't mount correctly https://launchpad.net/bugs/85085 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
