258 Implementing the IBM Storwize V5000 Gen2 with IBM Spectrum Virtualize V8.1
4. If you previously prepared a SAS host, as described in 5.3, “Preparing the host operating
system” on page 201, the WWPNs that you recorded in this section appear. If they do not
appear in the list, verify that you completed all of the required steps and check your
cabling. Then, click Rescan in the configuration wizard. Ensure that the ends of the SAS
cables are aligned correctly.
5. Under the Optional Fields section, you can set host type, the I/O groups that your host
can access, and the host cluster the host belongs if it is defined.
You can choose the host type. If you use HP/UX, OpenVMS, or TPGS, you must configure
the host. Otherwise, the default option (Generic) is acceptable.
6. Click Add Host and the wizard completes, as shown in Figure 5-71.
Figure 5-71 Completion of the Add Host wizard
Note: You can enter WWPNs manually. However, if these WWPNs are not visible to the
IBM Storwize V5000, the host object appears as offline and it is unusable for I/O
operations until the ports are visible.
Important: Host objects must belong to the same I/O groups as the volumes that you
want to map. Otherwise, the volumes are not visible to the host.
The IBM Storwize V5000 supports a maximum of four nodes per system. These nodes
are arranged as two I/O groups per cluster. Due to the host object limit per I/O group, for
maximum host connectivity, it is best to create hosts that use single I/O groups.
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