what are the steps for a password reset/recovery ?
I think you may have to call NetApp support. There is a INTERNAL kb that may be the way out.
How to reset Administrator or Monitor password for older E-Series arrays - NetApp Knowledge Base
Internal KB for resetting admin password for current E-Series array:How to reset SANtricity System Manager local admin password starting with 11.40.2
I am from the E-Series team. I confirm that you will need to contact NetApp Support to reset the password like Ontapforrum mentions.