Home > Storage > PowerMax and VMAX > Storage Admin > Reliability, Availability, and Serviceability on PowerMax 2500 and 8500 Arrays > New RAID distribution model
A new RAID distribution model is enabled by the disaggregation of compute and storage in the PowerMax system. It provides active/active RAID protection across storage pools in the system DMEs.
Flexible RAID provides all compute nodes in the system with active-active access to the storage resources that are distributed across all DMEs in the system. This new design reduces the RAID overhead of the system, allowing for much higher system capacity while using fewer drives. Rebuild efficiency is improved by over 2x with this new model.