I was trying to configure Multi-path software for a new cluster which is using Dell Compellent storage. Installed MPIO feature and was trying different options to get it configured. However, after each reboot, I still see two disk for each volume.
While trying to discover the Multipath from MPIO graphical interface, I noticed an error.
The program can’t start because MSVCR100.dll is missing from your computer
If I click on OK, Configuration will continue and end up in a reboot prompt. After reboot, I will still see two disk for each volume.
At last, I got a write-up which gave me a clue that this is a generic error where VC++ redistributable is missing. So on the next node, I tried it and it was successful.
The first step before starting MPIO configuration was installaing Microsoft Visual C++ 2010 Redistributable Package (x64)
And then proceed with MPIO configuration. From MPIO control Panel, Select Discover Multi-Path and then select Compellent from the list of devices listed. After that, Click on Add. System will configure MPIO and may take few minutes to complete.
At the end of configurations, a reboot prompt will be displayed. To complete MPIO configuration, Proceed with a reboot.