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d. In the Select LUN panel, which shows the available ports with their worldwide port
name (WWPN), as shown in the lower panel of Figure 2-5 on page 11, select the
logical unit number (LUN) that represents the boot volume. Then press Enter.
e. Check the boot entry that you just created.
11.Optional: Configure a second boot entry, for example, to have redundant links to the boot
volume. To configure a second HBA, complete the following steps:
a. On the main option panel of the utility, move the cursor down to the Select Host
Adapter entry and press Enter.
b. Select the same DS8000 volume, but a separate host port for the redundant
connection.
c. Repeat steps 1 on page 9 through 10 on page 11.
d. When BIOS configurations are complete, leave the utility and reboot the server.
12.To exit the configuration for the HBA, press ESC twice.
13.When you see the Configuration settings modified message in the lower panel, shown in
Figure 2-6, select Save changes (default) and press Enter.
Figure 2-6 Checking and saving changes
Configuring the BIOS for both HBAs gives you the advantage of a redundant connection to
the boot device, and enables the system to start even if part of the connectivity, for example a
switch, is unavailable.
Important: Redundant BIOS connections to the boot volume enable the system to start
even if a path to the storage system is missing. A failover capability is not provided when a
path fails during the boot process. Between the start of the boot process and the activation
of the operating system’s multipathing, the system is not protected against a path failure.
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IBM System Storage DS8000: Host Attachment and Interoperability