Hello, a customer had purchased a ES30 shelf (to be added on to the head unit). The DD head does not have any SAS controller module installed. I understood that in order for the system to recognize the SAS controller, one needs to power off the DD and boot it up. Only then will we be able to to successfully add the new shelf to the system.

Question is:-

Customers DD is connected to a Dlm ( Disk Library for Mainframe) and there is replication ongoing to 2 different sites from the production DD.

Prior to powering off the DD2500 (source) to perform the upgrade, is there anything that needs/required to be done on the Dlm?

We will have to upgrade the DD2500 shelf on the other 2 sites (targets) on a different schedule. Is there any special steps to it as well?

I was trying to search support.emc.com for clues on this but couldn't find any.

Appreciate any inputs to this query.