The Smart Array E200 Controller is a hardware RAID (Redundant Array of Independent Disks) controller produced by Hewlett Packard Enterprise (HPE), typically found in HP ProLiant servers. It is used to manage multiple hard drives or solid-state drives (SSDs) in RAID configurations for improved data storage, redundancy, and performance. The controller helps to handle data storage in a way that improves speed, reliability, and data protection, especially in enterprise-level environments where uptime is critical.

To allow Windows to properly communicate with the Smart Array E200 Controller and to enable full functionality, you need to install the appropriate Windows driver. The driver ensures that the operating system can recognize and interact with the controller, manage storage devices, and allow the server to boot from RAID arrays.