Home > Storage > Unity XT > Virtualization, Cloud & Applications > Dell EMC Unity: VMware vSphere Best Practices > VMware NFS datastores
When creating NFS-based storage for vSphere in a Dell Technologies Unity environment, Dell Technologies recommends creating VMware NFS datastores using the VMware-specific tools within Unisphere, rather than using general-purpose NFS file systems. VMware NFS datastores are optimized to provide better performance with vSphere. Additionally, creating two NAS servers (one on each SP) on the Dell Technologies Unity platform where NFS datastores are served is recommended for both availability and increased performance. Dell Technologies also recommends using the default 8K Host I/O Size for VMware NFS datastores. Only choose a different host I/O size if all applications that will be hosted in the NFS datastore primarily use the selected I/O size.