HP provides a script in the script repository that will enable the Windows Multipath I/O feature (MPIO) using PowerShell commands or ServerManagerCmd.
To create a Windows scripted installation OS Build Plan that enables MPIO after the OS installation
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Save a copy of the HP-provided Windows OS Build Plan, changing its name to better reflect the Windows functionality being installed.
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At the end of the OS Build Plan, after the OS has been installed, add the HP-provided script Add Windows Multipath IO Feature.
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After the Add Windows Multipath IO Feature step, add a Reboot step and a Wait for HP SA Agent step with the same script parameters as the last steps in the HP-provided Windows OS Build Plan.