A.The datastore must consist of only oneextent.
B.The datastore is managed by a single vCenter Server.
C.Auto-tierd storage must be compatable with SIOC.
D.Auto-tiered storage must be SSD or SATA.
E.The datastore must be VMFS.
Storage I/O Control (SIOC) is used to control the I/O usage of a virtual machine and to gradually
enforce the predefined I/O share levels. SIOC is supported on Fibre Channel and iSCSI connected
storage in ESX/ESXi 4.1 and 5.0. With ESXi 5.0 support for NFS with SIOC was also added.
Datastores with multiple extents or Raw Device Mapping (RDM) are currently not supported.