The storage filters that the vCenter Server provides help you avoid storage device corruption and performance degradation that can be caused by an unsupported use of LUNs. These filters are available by default.

Storage Filters




VMFS Filter

Filters out any storage devices, or LUNs, that are already used by another VMFS datastore on any host managed by the vCenter Server. Prevents LUN sharing by multiple datastores or a datastore and RDM combination.


RDM Filter

Filters out any LUNs that are already referenced by another RDM on any host managed by the vCenter Server. Prevents LUN sharing by a datastore and RDM combination. In addition, the filter prevents virtual machines from accessing the same LUN through different RDM mapping files.

If you need virtual machines to access the same raw LUN, they must share the same RDM mapping file. For details on this type of configuration, see Setup for Failover Clustering and Microsoft Cluster Service.


Same Host and Transports Filter

Filters out LUNs ineligible for use as VMFS datastore extents due a host or storage type incompatibility. Prevents you from adding the following LUNs as extents:

LUNs not exposed to all hosts that share the original VMFS datastore.

LUNs that use a storage type different from the one the original VMFS datastore uses. For example, you cannot add a Fibre Channel extent to a VMFS datastore on a local storage device.


Host Rescan Filter

Automatically rescans and updates storage devices after you perform datastore management operations. The filter helps provide a consistent view of all storage devices and VMFS datastores on all hosts managed by the vCenter Server.