Yes, that is definitely encrypted. Too bad you don't have DE, you could decrypt on the fly if you did. If you've already imaged the drive encrypted you should be able to decrypt using a My Book USB bridge. You just have to be sure that you set the LBA of the destination drive is set to be exactly the same as the original drive was (as shown by the SATA PCB). Then just match the encryption chip. If you provide the details of the encryption chip, I can point you in the right direction of which USB bridge you need.