Quick questions may seem silly.
I am not sure from you issue, is the dvd drive detected?
Can the system see the card (are the drivers installed)?
If you do sudo fdisk -l, do you see the drive listed along with your original drive? May get here cannot seek /dev/<drive>.
if you do in the following ls -d /dev/sd* or ls -lt /dev/sd*(this gives the time also), do you see an additional sd* device or more than one, lets say sda, sdb.