Adapter Specs Host Interface: PCI Express 3.0 x8 Controller Type: 6 Gb/s SAS with support for SATA Cache: 1 GB Flash‑Backed Write Cache (FBWC), DDR3‑1333 RAID Levels Supported: 0, 1, 5, 6, 10, 50, 60 SAS Ports: 2 internal x4 Mini‑SAS (SFF‑8087) Logical Drive Support: Up to 64 logical volumes Cache Bandwidth: Up to 10.6 GB/s with 1 GB FBWC Form Factor: Low‑profile PCIe card with full‑height bracket included Part Number: 631670-B21 The HPE Smart Array P420 with 1 GB FBWC accelerates server storage I/O by providing high-speed caching and support for multiple RAID levels, ensuring data redundancy and performance in enterprise environments. Its PCIe 3.0 x8 interface and 6 Gb/s SAS connectivity make it ideal for deployment in ProLiant Gen8 rack and tower servers. Equipped with a flash-backed cache, this controller allows online array expansion, RAID migration, and logical drive extension without downtime. It supports up to 64 logical drives, advanced features like SSD Smart Path, and broad OS compatibility, making it a robust choice for virtualization, databases, and mixed-data workloads.