HPE GreenLake for Block Storage is a new block protocol storage system powered by the Alletra Storage MP architecture. It combines innovative approaches with established elements from previous HPE systems, allowing for more flexible performance and capacity management. Unlike traditional systems, it addresses the need for performance without requiring additional capacity, thus avoiding the orphan capacity problem.

The new system allows for disaggregated growth, meaning users can add performance independently of capacity. This flexibility is achieved through a unique architecture that eliminates the need for a volatile write cache, instead using an intelligent write-through mechanism that directly writes to stable storage. This design enhances performance predictability and simplifies recovery processes.

The new Block MP systems retain advanced data services and APIs from previous HPE models, ensuring a smooth transition for existing customers. Benefits include easy and non-disruptive migrations, granular capacity additions, and enhanced features like Active Peer Persistence. Additionally, the architecture supports improved resilience and performance, allowing for better management of node failures.