vSphere Storage - ESXi 5.1 - Documentation - VMware

vSphere Storage
What to do next
Register newly created WWNs in the fabric so that the virtual machine is able to log in to the switch, and assign
storage LUNs to the WWNs.
Modify WWN Assignments
You can modify WWN assignments for a virtual machine with an RDM.
Typically, you do not need to change existing WWN assignments on your virtual machine. In certain
circumstances, for example, when manually assigned WWNs are causing conflicts on the SAN, you might need
to change or remove WWNs.
Prerequisites
Make sure to power off the virtual machine if you want to edit the existing WWNs.
Before you begin, ensure that your SAN administrator has provisioned the storage LUN ACL to allow the
virtual machine’s ESXi host to access it.
Procedure
1 Open the Virtual Machine Properties dialog box by clicking the Edit Settings link for the selected virtual
machine.
2 Click the Options tab and select Fibre Channel NPIV.
The Virtual Machine Properties dialog box opens.
3 Edit the WWN assignments by selecting one of the following options:
Option Description
Temporarily disable NPIV for this
virtual machine
Disable the WWN assignments for the virtual machine.
Leave unchanged The existing WWN assignments are retained. The read-only WWN
Assignments section of this dialog box displays the node and port values of
any existing WWN assignments.
Generate new WWNs New WWNs are generated and assigned to the virtual machine, overwriting
any existing WWNs (those of the HBA itself are unaffected).
Remove WWN assignment The WWNs assigned to the virtual machine are removed and it uses the HBA
WWNs to access the storage LUN. This option is not available if you are
creating a new virtual machine.
4 Click OK to save your changes.
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