What are the benefits of enabling Maintenance Mode on a PowerFlex node? (Choose two).

PowerFlex Maintenance Mode is a feature designed for planned, non-disruptive maintenance on a Storage Data Server (SDS) node. When a node is placed into maintenance mode, PowerFlex initiates a controlled data rebuild process. It automatically migrates the data residing on that node to other available nodes within the same Protection Domain. This ensures that data remains fully protected and available throughout the maintenance window. This process allows administrators to perform tasks such as hardware upgrades, firmware updates, or other physical maintenance on the node without causing service disruption or data unavailability for applications using the PowerFlex storage.

C. Isolates the node for troubleshooting: While maintenance mode does remove the node from active I/O, its primary purpose is graceful data migration for planned downtime, not simply isolation for troubleshooting, which may not require a full data evacuation.
D. Enables faster deduplication processes: Maintenance Mode is a feature focused on high availability and data protection during node outages. It has no direct function or impact on data reduction processes like deduplication or compression.

1. Dell PowerFlex Administration Guide (Version 4.x): In the chapter "Maintaining the system," the section "Placing a device or SDS in maintenance mode" states: "When you place a device or an SDS in maintenance mode, the system gracefully handles the removal of the component from the system. The system ensures that all data is fully protected and available before the component is removed. The system rebuilds the data that was on the component onto other components in the same protection domain." This directly supports that data is automatically replicated (rebuilt) to other nodes (B) to allow for non-disruptive maintenance like hardware upgrades (A).

2. Dell PowerFlex: Introduction and Concepts Guide (Version 4.x): The "Data protection and availability" section explains maintenance modes as a mechanism for planned events. It clarifies that placing a component in maintenance mode triggers a rebuild process to ensure data redundancy is maintained, thus preventing the system from entering a degraded state during planned activities. This confirms the purpose is to maintain operations during events like upgrades.