I've had this issue with a couple of different terminals so I'm look to see if anyone has an answer. I've imaged a drive on a radiant 1210 and tried to install it in another 1210 that had a failed hard drive. The unit will not boot and acts like the drive is not bootable. I tried taking a drive directly out of a unit and placing it in a different unit and the same thing. I got another 1210 to try with the same result. Is there something that needs to be reset after replacing the drive a 1210?