White Papers

Configure MPIO
23 Dell EMC SC Series Storage and Microsoft Multipath I/O | CML1004
5.2.2 Using PowerShell (Windows Server 2012 or later)
The MPIO module in PowerShell can be used to set the host server default load balance policy. For example,
to change the default load balance policy from round robin (RR) to failover only (FOO), open a PowerShell
window with elevated (administrator) privileges and enter:
Set-MSDSMGlobalDefaultLoadBalancePolicy –Policy "FOO"
To change the default load balancing back to round robin, enter:
Set-MSDSMGlobalDefaultLoadBalancePolicy –Policy "RR"
To verify the default load balancing policy, enter:
Get-MSDSMGlobalDefaultLoadBalancePolicy
• If the default policy is set to round robin, RR is returned.
• If the default policy is set to failover only, FOO is returned.
5.3 Per-volume load-balancing settings
The MPIO load balance policy can also be changed on a per-volume basis. This allows organizations with
different workloads on different volumes with different load-balancing requirements to run on the same server.
Use Disk Management or the MPCLAIM utility to change the per-volume policy.
Note: The PowerShell MPIO module does not include cmdlets that can change the default load balance
policy on a specific volume.
5.3.1 Using the disk management GUI:
1. Click Start > Administrative Tools > Computer Management.
2. In the tree view, click Storage > Disk Management.
3. Right-click the desired disk number and select Properties.
4. Select the MPIO tab.