Back up CD or DVD ie disk media with DD

In order to make a backup of a CD or DVD you want to first find the device name by typing the “mount” command.  Below you can see the device that is type iso9660 which is a give away that it is a optical media device.

$ mount
/dev/sda1 on / type ext4 (rw,errors=remount-ro,commit=0)
proc on /proc type proc (rw,noexec,nosuid,nodev)
none on /sys type sysfs (rw,noexec,nosuid,nodev)
fusectl on /sys/fs/fuse/connections type fusectl (rw)
none on /sys/kernel/debug type debugfs (rw)
none on /sys/kernel/security type securityfs (rw)
none on /dev type devtmpfs (rw,mode=0755)
none on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
none on /dev/shm type tmpfs (rw,nosuid,nodev)
none on /var/run type tmpfs (rw,nosuid,mode=0755)
none on /var/lock type tmpfs (rw,noexec,nosuid,nodev)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,noexec,nosuid,nodev)
/home/user/.Private on /home/bab type ecryptfs (ecryptfs_check_dev_ruid,ecryptfs_sig=8d1c115a6a1982b4,ecryptfs_fnek_sig=48a424107752079f,ecryptfs_cipher=aes,ecryptfs_key_bytes=16,ecryptfs_unlink_sigs)
gvfs-fuse-daemon on /home/bab/.gvfs type fuse.gvfs-fuse-daemon (rw,nosuid,nodev,user=bab)
/dev/sr0 on /media/327 type iso9660 (ro,nosuid,nodev,uhelper=udisks,uid=1000,gid=1000,iocharset=utf8,mode=0400,dmode=0500)

/dev/sr0 is the device name of the disk drive.

So as you can see below if= the source and of= is the destination.

$ dd if=/dev/sr0 of=/home/user/fileName.iso
54520+0 records in
54520+0 records out
27914240 bytes (28 MB) copied, 11.2879 s, 2.5 MB/s