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30 PowerVM Migration from Physical to Virtual Storage
On the standalone source host
3. Shut down the standalone host and remap the SAN rootvg LUN on the Fibre
Channel switches from the standalone host’s physical Fibre Channel adapter
to the client partition virtual Fibre Channel adapter. The WWPNs will be found
in the client virtual Fibre Channel adapter properties and will look similar to
Figure 2-9.
Figure 2-9 Virtual Fibre Channel Adapter Properties
Note: Each time that you configure a virtual Fibre Channel adapter,
whether dynamically or by adding to a partition profile, the HMC obtains a
new, non-reusable, pair of WWPNs from the POWER Hypervisor.
Therefore, the correct procedure for dynamically allocating a virtual Fibre
Channel adapter to an active partition that must keep the configuration
across a partition shutdown is to first dynamically allocate the adapter to
the partition and then use the HMC Save Current Configuration feature to
save the configuration to a new profile. This new profile then must be used
to start the partition after a shutdown. This ensures that the WWPNs that
were allocated during the dynamic operation will be the same ones in the
profile. If instead you dynamically add an adapter and then add an adapter
to the partition profile, the partition will come up with a different pair of
WWPNs after a partition shutdown and access to the storage will be lost.