Storage Encryption protects your data if disks are lost or stolen.
Someone who comes into possession of disks that store data using Storage Encryption cannot access the data. Without the authentication key that is required to authenticate and unlock the disks, all attempts to read or write data result in an error message returned by the SEDs.
Circumventing the disk authentication by moving the platters into another disk without encryption firmware would be unsuccessful as well. The data stored on the platters appears as ciphertext and is fully protected from unauthorized access.