Below is the Webex invitation for the maintenance window that you have scheduled. As you requested, I have scheduled the meeting for 10:30 pm (GMT+07:00) on the 19th of August. I believe the previous engineer who worked on this case already informed you of what the recovery procedure will involve, but please feel free to ask me questions if you require additional clarification. Please make sure that you have physical access to the switch during the maintenance window, as we will likely have to reseat the currently active supervisor, in order to deal with the dual flash failure.