HP - 442844-B21 64MB Cache for E200 RAID controller

Product Description

The HP 442844-B21 is an essential accessory for the HP Smart Array E200 RAID controller, specifically designed to boost its performance and data integrity. This module provides 64MB of cache memory, which significantly accelerates write operations by allowing the controller to acknowledge writes more quickly. Instead of waiting for data to be written to the physical disks, the controller can write it to the cache first, freeing up the host system and improving overall application responsiveness. A critical feature of this cache module is its Battery-Backed Write Cache (BBWC) capability. This means that the data stored in the cache is protected by a battery in the event of a sudden power loss or system interruption. This protection mechanism ensures that no data is lost during unexpected downtime, preventing data corruption and the need for lengthy data recovery processes. The battery typically provides power to the cache for a sufficient duration to safely flush the data to the disk drives once power is restored. By incorporating the 442844-B21 cache module, administrators can achieve higher throughput for RAID arrays managed by the E200 controller. This is particularly beneficial in environments with heavy write workloads, such as databases, transaction processing systems, and virtualization platforms. It represents a cost-effective way to enhance the capabilities of existing HP server hardware, improving both performance and data safety.