The HP AP839B is the Small Form Factor (SFF) chassis variant of the HP P2000 G3 storage system, offered without controllers for customers looking to customize their storage infrastructure according to specific needs. This chassis supports up to 24 SFF drives, providing a compact and efficient storage solution that is suitable for a variety of applications, including virtualization, high-performance computing, and general data storage tasks. It offers the flexibility to integrate preferred controller units, enabling tailored performance and connectivity features, such as Fibre Channel, iSCSI, or SAS. The HP AP839B is engineered for scalability and high availability, making it an ideal choice for businesses planning to build a resilient and expandable storage environment that can adapt to changing requirements over time.