Question moved to 'Encryption : EEM Managed' (in Business / Data Protection) for attention
Is it with EEFF or EEPC?
As George says, first tell us what product you are using.
But the answer is yes, if you are a legitimate administrator of that drive you'll have all the diagnostic and recover tools needed to decrypt it. If not, probably not - if it's really an eSATA (ie extenal drive), you'd need to connect it to the original PC which encrypted it to access it - knowing the user name and password is not helpful, as that's related to the machine's boot drive, not the external 2nd drive.