When you perform VMFS datastore management operations, vCenter Server uses default storage filters. The filters help you to avoid storage corruption by retrieving only the storage devices, or LUNs, that can be used for a particular operation. Unsuitable LUNs are not displayed for selection. You can turn off the filters to view all LUNs.
Before making any changes to the LUN filters, consult with the VMware support team. You can turn off the filters only if you have other methods to prevent LUN corruption.
Procedure
1 In the vSphere Client, select Administration > vCenter Server Settings.
2 In the settings list, select Advanced Settings.
3 In the Key text box, type a key.
| Key | Filter Name |
| config.vpxd.filter.vmfsFilter | VMFS Filter |
| config.vpxd.filter.rdmFilter | RDM Filter |
| config.vpxd.filter.SameHostAndTransportsFilter | Same Host and Transports Filter |
| config.vpxd.filter.hostRescanFilter | Host Rescan Filter |
NOTE If you turn off the Host Rescan Filter, your hosts continue to perform a rescan each time you present a new LUN to a host or a cluster.
4 In the Value text box, type False for the specified key.
5 Click Add.
6 Click OK.
You are not required to restart the vCenter Server system.
vCenter Server Storage Filtering
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
Filter: VMFS Filter
Description:
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.
Key: config.vpxd.filter.vmfsFilter
Filter: RDM Filter
Description :
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.
Key: config.vpxd.filter.rdmFilter
Filter: Same Host and Transports Filter
Description:
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:
- l LUNs not exposed to all hosts that share the original VMFS datastore.
- l 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.
Filter: Host Rescan Filter
Description:
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.
Key: config.vpxd.filter.hostRescanFilter
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