You can use System Manager to delete storage virtual machines (SVMs) that you no longer require from the storage system configuration.
If you delete SVMs that are configured to use Kerberos, or modify SVMs to use a different Service Principal Name (SPN), the original service principal of the SVM is not automatically deleted or disabled from the Kerberos realm. You must manually delete or disable the principal. You must have the Kerberos realm administrator's user name and password to delete or disable the principal.
If you want to move data from an SVM to another SVM before you delete the first SVM, you can use the SnapMirror technology to do so.