Manage local and networked storage device that your ESXi host has access to. Understanding Storage Device NamingEach storage device, or LUN, is identified by several names. Storage Refresh and Rescan OperationsThe refresh operation for datastores, storage devices, and storage adapters updates the lists and storage information displayed in the vSphere Web Client. For example, it updates such information as the datastore capacity. When you perform storage management tasks or make changes in the SAN configuration, you might need to rescan your storage. Identifying Device Connectivity ProblemsWhen your ESXi host experiences a problem while connecting to a storage device, the host treats the problem as permanent or temporary depending on certain factors.