What actions are taken when reconfiguring Storage Data Servers during cluster expansion? (Choose two).

When expanding a Dell PowerFlex cluster by adding new Storage Data Servers (SDS), two critical actions are performed. First, the system validates that the new node's software version and configuration are compatible with the existing cluster to ensure stability and successful integration. Second, the administrator must configure the Fault Set for the new SDS. Assigning the new node to a specific Fault Set is essential for maintaining the cluster's data protection and high-availability policies, ensuring that data copies are distributed across different failure domains.

B. Reallocate storage pools for load balancing: This is an automatic rebalance process that occurs after the new SDS has been successfully added and configured, not a direct action taken during the reconfiguration itself.
D. Enable data deduplication on new SDS nodes: Data deduplication and compression are features enabled at the Storage Pool level, not on individual SDS nodes as they are being added to the system.

1. Dell PowerFlex 4.5.x Administration Guide (Page 128, "Add an SDS to a Protection Domain"): The procedure for adding an SDS explicitly requires specifying the Protection Domain and the Fault Set to which the new SDS will belong. The command syntax is scli --addsds ... --faultsetname . This directly supports option C.

2. Dell PowerFlex 4.5.x Concepts and Architecture Guide (Page 31, "Fault Sets"): This document explains, "Fault Sets are configured by the user to define groups of SDSs that are likely to fail at the same time... When adding an SDS to a Protection Domain, you must assign it to a Fault Set." This reinforces the mandatory nature of configuring Fault Sets during expansion.

3. Dell PowerFlex 4.5.x Deployment Guide (Page 58, "System expansion"): The guide notes the importance of ensuring software versions are consistent across all components before expansion. The system's management layer (PowerFlex Manager or CLI) implicitly performs compatibility checks; if a version mismatch or other incompatibility exists, the "add SDS" operation will fail. This supports the validation action in option A.