HPE P47781-B21

Overview

The HPE P47781-B21 is a Gen11 storage controller designed to fit into the OCP NIC 3.0 slot, providing servers with 8 GB of dedicated cache and a 16-lane PCIe Gen4 connection to the processor. It supports up to 240 drives, including SATA at 6 Gbps, SAS at 12 Gbps, and NVMe at 16 Gbps, allowing for flexible storage configurations that combine legacy and modern media. This controller is ideal for environments where virtual machines, databases, and backup operations demand consistent and high-performance disk access.

Key features

• 8 GB cache accelerates read and write operations, reducing latency during heavy workloads.
• PCIe Gen4 interface with 16 lanes ensures high bandwidth and low latency communication with the CPU.
• Supports a mix of SATA, SAS, and NVMe drives within a single storage pool, enabling tiered storage strategies.
• Hardware RAID levels 0, 1, 5, 6, 10, 50, and 60 provide robust data protection options, while pass-through mode allows hypervisors direct drive access.
• Delivers up to 240,000 IOPS in RAID5 workloads and up to three million random write IOPS, maintaining performance during rebuilds and snapshots.
• OCP NIC 3.0 form factor frees up primary PCIe slots for GPUs, network adapters, or accelerators, optimizing server expansion.
• Two LP SlimSAS ports offer flexible internal cabling options suitable for dense chassis environments.
• Firmware is validated across major platforms including Windows Server, Red Hat Enterprise Linux, and VMware vSphere, simplifying deployment and compatibility management.
• Includes a three-year parts-only warranty for peace of mind in enterprise deployments.

Key specs

• Cache: 8 GB dedicated
• PCIe interface: Gen4 x16 lanes
• Drive support: Up to 240 SATA (6 Gbps), SAS (12 Gbps), and NVMe (16 Gbps) drives
• RAID levels: 0, 1, 5, 6, 10, 50, 60, plus pass-through mode
• RAID5 IOPS: Up to 240,000
• Random write IOPS: Up to 3,000,000
• Form factor: OCP NIC 3.0
• Ports: Two LP SlimSAS internal connectors
• Compatibility: Windows Server, Red Hat Enterprise Linux, VMware vSphere
• Warranty: Three years parts-only

Connectivity and compatibility

This controller’s two LP SlimSAS ports provide versatile internal connections, supporting a wide range of drive types and configurations within dense server chassis. Its adherence to the OCP NIC 3.0 standard means it installs in a dedicated slot, leaving main PCIe slots free for other expansion cards. The firmware’s validation with popular operating systems and virtualization platforms ensures smooth integration into existing data center environments without the hassle of driver conflicts or compatibility issues.

Performance and reliability

Designed to handle demanding workloads, this controller excels in scenarios where multiple virtual machines, databases, and backup processes access storage simultaneously. Its hardware RAID engine supports multiple levels of data protection, balancing performance and redundancy. The high IOPS capabilities, especially in RAID5 and random write operations, help maintain low latency even during intensive rebuilds or snapshot activities, making it a dependable choice for critical enterprise storage tasks.

Ideal uses and environments

The HPE P47781-B21 fits well in virtualized clusters requiring high IOPS for virtual desktop infrastructure, backup targets that handle continuous data streams, and database nodes where uninterrupted performance is essential. Its support for mixed drive types and tiered storage setups makes it suitable for organizations transitioning from traditional spinning disks to solid-state drives. This controller is a strong option for IT administrators managing HPE ProLiant Gen11 servers who need predictable, high-speed storage performance with flexible configuration options.

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If you need warranty service, please file the claim directly with the manufacturer. They may require proof of purchase, the product serial number, original packaging, photos, or basic troubleshooting. Some brands ask you to register the product or obtain a case number before shipping it for repair or replacement. We don’t submit or approve claims, but we can point you to the correct support links and contact details.

Keep your invoice and packaging in a safe place, and report any functional issues to the manufacturer as soon as they appear. If you’re unsure whether a problem is covered, the manufacturer’s support team can confirm next steps and timelines. While we cannot intervene in decisions or outcomes, we’re happy to provide purchase documentation or guidance so you can move through the warranty process smoothly.

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