Increase Capacity of VMFS Datastore in Storage DRS Cluster

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To increase the capacity of an existing VMFS datastore that is participating in a Storage DRS cluster, a vSphere administrator must take the following two steps:

1. Select the target datastore to grow and click the Increase Datastore Capacity icon:

The first step is to select the target datastore in the vSphere Web Client navigator and click on the "Increase Datastore Capacity" icon. This action initiates the process of increasing the capacity of the selected datastore.

When this icon is clicked, a dialog box appears that allows the administrator to specify the new capacity for the datastore. The administrator should enter the new capacity and click the OK button to proceed.

2. Select the target datastore cluster and click the Add Datastore icon:

The second step is to select the target datastore cluster in the vSphere Web Client navigator and click on the "Add Datastore" icon. This action initiates the process of adding the newly expanded datastore to the datastore cluster.

When this icon is clicked, a wizard appears that guides the administrator through the process of adding the datastore to the cluster. The administrator should select the datastore that was just expanded and follow the steps to add it to the cluster.

It's worth noting that before expanding a datastore, it's important to ensure that there is enough physical space on the underlying storage system to accommodate the expansion. Additionally, it's important to ensure that the Storage DRS cluster is properly configured and that there is enough space available on the other datastores in the cluster to balance the workload.