A customer recently migrated to an HP 3PAR StoreServ 7200 Storage System which has two additional drive chassis. The customer plans to add more disk drives to the storage system. What is the minimum…

Three drives cannot be divided evenly across a two-chassis, two-node configuration without creating an asymmetric and unbalanced storage layout.

The HP 3PAR StoreServ 7200 uses a dual-node controller design where drives must be distributed evenly across all attached chassis to ensure balanced I/O load and optimal performance. With two additional drive chassis, a minimum of four drives - two per chassis - satisfies the even distribution requirement across both controllers and all chassis simultaneously.

Six drives would maintain balance across the two-chassis topology but exceeds the minimum required - four drives already satisfy the balanced distribution requirement.

Nine drives cannot be evenly distributed across a two-node, two-chassis architecture and would result in an unbalanced system configuration.