HPE 631681-B21 – 2GB Smart Array Flash Backed Write Cache Module

HPE 631681-B21 – 2GB Smart Array Flash Backed Write Cache Module

Overview

The HPE 631681-B21 is a Smart Array Flash Backed Write Cache (FBWC) module designed for HPE ProLiant servers to accelerate RAID write performance and protect cached data during power loss. It combines high-speed cache memory with flash-backed protection to ensure data integrity in storage operations.

This module is used with HPE Smart Array RAID controllers in enterprise servers where write-intensive workloads require improved I/O performance. It temporarily stores write operations in cache to reduce latency and improve throughput.

In the event of a power failure, the module preserves cache data using flash-based protection instead of traditional battery-backed systems. This eliminates dependency on battery life cycles and improves long-term reliability.

It is commonly deployed in Gen8 and Gen9 ProLiant server environments within enterprise data centers, virtualization platforms, and database systems requiring high-performance RAID caching.

Typical Deployment Scenarios

Used in HPE ProLiant Gen8 and Gen9 servers running Smart Array RAID controllers with FBWC support. Common in virtualization clusters, SQL/database workloads, and enterprise storage systems where write-heavy operations require low latency and high data protection.

Technical Specifications

Compatibility / Ecosystem

Compatible with HPE Smart Array P-series RAID controllers in HPE ProLiant Gen8 and Gen9 server platforms. Designed for enterprise storage environments requiring high-speed caching and flash-backed data protection without traditional battery limitations.