Storage DRS allows you to manage the aggregated resources of a datastore cluster. When Storage DRS is enabled, it provides recommendations for virtual machine disk placement and migration to balance space and I/O resources across the datastores in the datastore cluster.

When you enable Storage DRS, you enable the following functions.

Space load balancing among datastores within a datastore cluster.

I/O load balancing among datastores within a datastore cluster.

Initial placement for virtual disks based on space and I/O workload.

The Enable Storage DRS check box in the Datastore Cluster Settings dialog box enables or disables all of these components at once. If necessary, you can disable I/O-related functions of Storage DRS independently of space balancing functions.

When you disable Storage DRS on a datastore cluster, Storage DRS settings are preserved. When you enable Storage DRS, the settings for the datastore cluster are restored to the point where Storage DRS was disabled.

1

In the vSphere Client inventory, right-click a datastore cluster and select Edit Settings.

2

Click General.

3

Select Turn on Storage DRS and click OK.

4

(Optional) To disable only I/O-related functions of Storage DRS, leaving space-related controls enabled, perform the following steps.

a

Select SDRS Runtime Rules.

b

Deselect the Enable I/O metric for Storage DRS check box.

5

Click OK.