![]() After you add selected devices and reboot, you will see them on “MPIO Devices” tab. You can enable MPIO for particular hardware ID (in other words, storage system) on Discover Multi-Paths tab of MPIO control panel. ![]() Initially you will see two hard drives for each LUN in Device Manager. In my case MPIO installation file was called SMIA-WSX64-.0608. IBM storage works well with default Windows MPIO implementation, however it’s recommended to install IBM MPIO (device-specific module) from Storage Manager installation bundle. After installation is complete you will find MPIO configuration options under Control Panel and in Administrative Tools. Now you can install MPIO from “Feautures” sub-menu of Windows Server 2008 Server Manager. Prior to Windows Server 2008, Microsoft didn’t have its own MPIO implementation and MPIO was distributed with IBM DS Storage Manager product. I’ll desribe how to configure MPIO version for Windows. Software which provides this failover functionality is called Multipath I/O (MPIO) and has implementations for all operating systems. ![]() ![]() So redundant path here is used only as a failover. It means that access to each LUN is given through one controller, in constrast to active/active storage where data between host and two controllers can flow in round-robin fashion. ![]() IBM mid-range storage systems (like DS3950) work in active/passive mode. ![]()
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February 2023
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