HPE Smart Array P408i-a SR Gen10 (8 Internal Lanes/2GB Cache) 12G SAS Modular Controller

Overview

The HPE 804331-B21 is a Smart Array P408i-a SR Gen10 modular controller designed to fit into the dedicated type-a storage slot of compatible ProLiant Gen10 servers. It provides high-speed connectivity to internal SAS or SATA drives with eight lanes running at 12 Gb/s each, ensuring fast data transfer for demanding workloads. With a 2 GB flash-backed write cache, it enhances write performance and protects data integrity during power interruptions, making it well suited for virtual machine hosts, database servers, and media storage systems.

Key features

• Eight internal SAS lanes deliver direct, high-throughput connections to SAS or SATA drives, optimizing storage performance.
• 12 Gb/s transfer rate per lane supports rapid data movement even under heavy I/O loads.
• 2 GB flash-backed write cache accelerates write operations while safeguarding data in case of power loss.
• Installation in a type-a modular slot preserves PCIe slots for networking, graphics, or other expansion cards.
• Supports a comprehensive range of RAID levels (0, 1, 5, 6, 10, 50, 60) plus Mixed Mode for combining RAID and HBA passthrough on the same controller.
• Optional encryption protects data at rest, enhancing security for sensitive environments.
• SmartCache feature enables tiering of frequently accessed data onto SSDs, improving read performance.
• Qualified for seamless integration with HPE ProLiant DL360, DL380, ML350, and XL450 Gen10 servers, simplifying deployment.

Key specs

• Interface: PCIe 3.0 x8 host connection
• Internal lanes: 8 SAS lanes at 12 Gb/s each
• Cache: 2 GB flash-backed write cache
• RAID support: Levels 0, 1, 5, 6, 10, 50, 60, plus Mixed Mode
• Compatibility: HPE ProLiant DL360, DL380, ML350, XL450 Gen10 servers
• Form factor: Type-a modular slot

Connectivity and compatibility

This controller connects directly to internal SAS or SATA drives through eight dedicated lanes, providing a stable and high-speed link for storage devices. Its modular design fits into a specialized slot on supported HPE ProLiant Gen10 servers, freeing up standard PCIe slots for other expansion needs. The broad RAID support and Mixed Mode capability allow flexible storage configurations tailored to different workloads and data protection requirements.

Performance and reliability

The 2 GB flash-backed write cache plays a crucial role in maintaining consistent throughput and low latency by temporarily storing write data and protecting it against power failures. This feature is especially valuable in environments where data integrity and performance are critical, such as database operations and virtualized workloads. Optional encryption adds a layer of security, ensuring that stored data remains protected against unauthorized access.

Ideal uses and environments

This controller is a strong choice for mid-size businesses, remote offices, and enterprise data centers that require reliable local storage with flexible RAID options and high throughput. It fits well in setups where preserving PCIe slots for other cards is important, and where workloads demand consistent performance and data protection. IT teams will appreciate the straightforward installation and management through HPE’s Smart Storage Administrator interface, making it practical for a variety of professional server environments.