DeviceManager can monitor the performance of which components?

• A. Controllers
• B. Front-end ports
• C. Back-end ports
• D. All of the above

Answer: (D)

DeviceManager monitors performance across the entire storage I/O path, including controllers, front-end ports, and back-end ports. Controllers handle IO processing, caching, and coordination of requests; front-end ports connect to hosts and carry I/O into the array; back-end ports link the controllers to disks and the storage shelves. Because bottlenecks can occur at any point along this path, DeviceManager collects and presents metrics for each component—such as utilization, IOPS, bandwidth, and latency—so you have a complete view of how data moves from host to disk. This full visibility helps you pinpoint where performance issues originate, whether on the host connection, inside the controller, or on the disk side.