Users Guide

6. Repeat steps 3–5 for additional virtual disks to present or click Close.
NOTE: When your storage array uses multiple groups of HBAs per ESXi host, balance the new
virtual disks across all hosts or host groups. Do not add all the virtual disks to a single host or
host group because I/O balancing cannot occur if you do.
Rescan Storage Adapters
After you map the virtual disks to the ESXi hosts, you must rescan the storage adapters on the ESXi host
to detect the new storage virtual disks. This action is accomplished under the Manage tab in the Hosts
and Clusters view. Select Storage for the ESXi host that you want to configure, and then click the Rescan
all Storage Adapters icon.
NOTE: You may need to run the Rescan, from vCenter, twice to detect all of the new storage virtual
disks that have been mapped to the ESXi host.
Figure 42. Storage Storage Adapters
1. From this view, you can also verify that the correct number of paths have been configured by
clicking one of the devices listed under the storage adapter.
2. Select the Paths tab to view the details of the selected device. For round robin PSP, you must see
four active connections with two denoting I/O. For most recently used PSP, you must see either four
active connections with one channel showing I/O or two active connections and two standby
connections and one of the active channels showing I/O.
3. To change the PSP method for a device, select the Properties tab under Device Details pane, scroll
down to the Edit Multipathing button. Click the button and select path selection policy to apply to
the device from the drop-down menu. Click OK.
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