The ServeRAID-MR10M SAS/SATA Controller is a high-performance PCIe RAID Controller for external direct-attached storage, including IBM System Storage EXP3000. This RAID adapter provides investment protection by supporting SAS and SATA hard drive configurations, and providing performance enhancements enabled by a standard battery. The battery enables cached data protection during unexpected power outages when the controller is operating in its higher performance, write back mode.