I/O load balancing fails during Storage DRS invocation

Products

• VMware vSphere ESXi

Issue/Introduction

When you attempt to create a datastore cluster, the vSphere Storage DRS faults page displays the following error:

Could not run I/O load balancing due to mis-configuration or insufficient information, during Storage DRS invocation”

This occurs when there is a lack of connectivity from hosts to datastores and that eventually disables I/O load balancing.

Environment

VMware vSphere ESXi 5.5

Resolution

You must resolve the partial connectivity from hosts to datastores. If the connectivity cannot be restored, perform the following steps to disable I/O load balancing:

1. Select the datastore cluster from the inventory list.
2. Click Manage, and then click Settings.
3. Select Storage DRS and click Edit.
4. Deselect the Enable I/O metric for SDRS recommendations check box.
5. Click OK.

When the connectivity is restored, Storage DRS automatically performs I/O load balancing without any further input.