What is the correct sequence of operations used by the PowerProtect DD DIA in the end-to-end verification process?

A technician is upgrading a DD9400 with a DS60 expansion shelf with 60 drives. In the GUI interface, only 30 drives are accessible.
What is causing these drives to be inaccessible?
Which component of PowerProtect DD is Data Invulnerability Architecture a feature of?
Which protocol is used for communications between a PowerProtect DD appliance and cloud tier to Dell EMC ECS?
What is the preferred method to ensure backups are protected against deletion or corrupt?
A customer needs a backup system to protect 100 TB of mission-critical data. What should be used to back up the system?
A PowerProtect DD appliance with two expansion shelves is being installed in a customer-provided rack. When cabling the controller to the shelves, what is connected to the host port on the last shelf in the chain?
When using the DD VTL Tape Out to Cloud feature, which status will a tape show once it is in the cloud tier vault?
An administrator is configuring a Google Cloud Provider cloud unit on their DD9900. Which certificate must be imported before adding the cloud unit?
What rule must be followed during an upgrade procedure with the FS25 expansion shelf?