6.5.1

By default, VMware supports the following path selection policies. If you have a third-party PSP installed
on your host, its policy also appears on the list.
Fixed (VMware) The host uses the designated preferred path, if it has been configured.
Otherwise, it selects the first working path discovered at system boot time.
If you want the host to use a particular preferred path, specify it manually.
Fixed is the default policy for most active-active storage devices.
Note If the host uses a default preferred path and the path's status turns
to Dead, a new path is selected as preferred. However, if you explicitly
designate the preferred path, it will remain preferred even when it becomes
inaccessible.
Most Recently Used
(VMware)
The host selects the path that it used most recently. When the path
becomes unavailable, the host selects an alternative path. The host does
not revert to the original path when that path becomes available again.
There is no preferred path setting with the MRU policy. MRU is the default
policy for most active-passive storage devices.
Round Robin (VMware) The host uses an automatic path selection algorithm rotating through all
active paths when connecting to active-passive arrays, or through all
available paths when connecting to active-active arrays. RR is the default
for a number of arrays and can be used with both active-active and active-
passive arrays to implement load balancing across paths for different LUNs.
Change the Path Selection Policy
Generally, you do not need to change the default multipathing settings your host uses for a specific
storage device. However, if you want to make any changes, you can use the Edit Multipathing Policies
dialog box to modify a path selection policy and specify the preferred path for the Fixed policy. You can
also use this dialog box to change multipathing for SCSI-based protocol endpoints.
Procedure
1 Browse to the host in the vSphere Web Client navigator.
2 Click the Configure tab.
3 Under Storage, click Storage Devices or Protocol Endpoints.
4 Select the item whose paths you want to change and click the Properties tab.
5 Under Multipathing Policies, click Edit Multipathing.
vSphere Storage
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