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About Primary Storage Primary storage is associated with a cluster, and it stores the disk volumes for all the VMs running on hosts in that cluster. You can add multiple primary storage servers to a cluster. At least one is required. It is typically located close to the hosts for increased performance. &PRODUCT; is designed to work with all standards-compliant iSCSI and NFS servers that are supported by the underlying hypervisor, including, for example: Dell EqualLogicâ„¢ for iSCSI Network Appliances filers for NFS and iSCSI Scale Computing for NFS If you intend to use only local disk for your installation, you can skip to Add Secondary Storage.