If you have changed your original encryption container/volume password, and then recovered a corrupted volume using the internal/embedded backup technique, then you can only mount the encrypted volume using this original password
. This is because the internal/embedded header backup is only created once, storing the original password within the backup - subsequent changes in password are never
written to the internal/embedded header backup.
If you cannot remember the original password, then you must
use the external backup technique as outlined in Method 2 below. This technique assumes that you created the external backup prior to the container header becoming corrupted - refer to Step 3 - Disaster Recovery