Isilon OneFS 7.2 default root password

Hi gents, Please advise the default root password for Isilon OneFS 7.2.x, I'm able to login to the box with admin account but its not allow to change the root password, giving an error Error #1: Failed to modify user root: Incorrect access attempt. [Access -- Membership& Roles -- Users -- admin --"password - no value" Edit -- new password ]. Please advise the default root password ifany or how to reset the root password from admin login privilege. TIA.