You can attach an existing datastore to one or more new hosts inside a cluster or datacenter.
Before you begin
Verify that host groups have been created for the hosts and that zoning is configured properly.
From the Navigator pane, or the Objects tab, double-click and select the storage system with the datastore to be attached.
Click the Manage tab, and then click the Datastores tab.
Click the Configure Datastore icon.
Click the Attach Datastore option, and then click Next.
Select the datastore to attach, and then click Next.
Select the cluster or host. Click Next.
Review the summary details, and then click Finish.