6.0.1

Storage Filtering
vCenter Server provides storage lters to help you avoid storage device corruption or performance
degradation that might be caused by an unsupported use of storage devices. These lters are available by
default.
Table 16‑4. Storage Filters
Filter Name Description
cong.vpxd.lter.vmfsFilter
(VMFS Filter)
Filters out storage devices, or LUNs, that are already used by a VMFS datastore on any
host managed by vCenter Server. The LUNs do not show up as candidates to be
formaed with another VMFS datastore or to be used as an RDM.
cong.vpxd.lter.rdmFilter
(RDM Filter)
Filters out LUNs that are already referenced by an RDM on any host managed by vCenter
Server. The LUNs do not show up as candidates to be formaed with VMFS or to be used
by a dierent RDM.
For your virtual machines to access the same LUN, the virtual machines must share the
same RDM mapping le. For information about this type of conguration, see the vSphere
Resource Management documentation.
cong.vpxd.lter.SameHostsAndTrans
portsFilter
(Same Hosts and Transports Filter)
Filters out LUNs ineligible for use as VMFS datastore extents because of host or storage
type incompatibility. Prevents you from adding the following LUNs as extents:
n
LUNs not exposed to all hosts that share the original VMFS datastore.
n
LUNs that use a storage type dierent 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.
cong.vpxd.lter.hostRescanFilter
(Host Rescan Filter)
Automatically rescans and updates VMFS datastores after you perform datastore
management operations. The lter helps provide a consistent view of all VMFS datastores
on all hosts managed by vCenter Server.
N If you present a new LUN to a host or a cluster, the hosts automatically perform a
rescan no maer whether you have the Host Rescan Filter on or o.
Set Up Dynamic Disk Mirroring
Typically, you cannot use logical-volume manager software on virtual machines to mirror virtual disks.
However, if your Microsoft Windows virtual machines support dynamic disks, you can protect the virtual
machines from an unplanned storage device loss by mirroring virtual disks across two SAN LUNs.
Prerequisites
n
Use a Windows virtual machine that supports dynamic disks.
n
Required privilege: Advanced
Procedure
1 Create a virtual machine with two virtual disks.
Make sure to place the disks on dierent datastores.
2 Log in to your virtual machine and congure the disks as dynamic mirrored disks.
See Microsoft documentation.
3 After the disks synchronise, power o the virtual machine.
4 Change virtual machine seings to allow the use of dynamic disk mirroring.
a Right-click the virtual machine and select Edit .
b Click the VM Options tab and expand the Advanced menu.
c Click Edit  next to Conguration Parameters.
vSphere Storage
174 VMware, Inc.