Abstract
We propose a technique called the Autonomous Non-stop Microcode Updating Technology to achieve high available dual controller storage systems. All commands which the microcode updating controller receives are transferred to other controller and executed by it, so that the microcode updating controller is released from any command operations, and storage administrators can execute microcode updating operation without any help of server administrators. The results of simulation with actual simulated load reveal that increase of average response time is 0.54ms and increase ratio is 19%. Performance of application is not affected by the results. In addition, we estimate the controller pause time during non-stop microcode updating process is 150ms at a maximum by this evaluation. Proposed technology achieves availability of 99.999%.
