Which storage tier is not supported by SmartTier of the OceanStor V3 storage systems?

What command can be used on the CLI to view the status of the controllers in the OceanStor V3 storage systems?

For performance reasons it is often necessary to buy a lot of smaller capacity disk drives.

In OceanStor V3 storage systems, remote replication allows a user to perform a primary/secondary switchover when the secondary LUN is in which data statuses? (Multiple Choice)

What components does the backup system consist of? (Multiple Choice)