Hewlett Packard Enterprise 820834-B21 RAID Controller

The Hewlett Packard Enterprise 820834-B21 Smart Array P440 RAID Controller is a 12 Gb/s SAS storage controller designed for HPE ProLiant server systems to boost RAID performance and data storage reliability in enterprise IT and data center environments. It connects via PCIe 3.0 x8 and provides a 12 Gb/s SAS interface with a single internal mini-SAS (SFF-8643) port, plus 2 GB of FBWC (Flash Backed Write Cache) to protect write data during heavy I/O. Supporting RAID levels 0, 1, 5, 6, 10, 50, and 60, it enables flexible, fault-tolerant configurations for varied workloads. Management is performed through HPE Smart Storage Administrator (SSA), aligning with enterprise server storage and RAID management tasks in virtualization, database platforms, backup solutions, and high-performance computing environments. Compatible with HPE ProLiant Gen9 servers; spare part number 830057-001; common replacements include 726736-B21, 749796-B21, and 804405-B21.