Steps
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Map the SAN boot LUN to the host.
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Verify multiple paths are available.
Remember, multiple paths will only be available after the host OS is up and running on the paths.
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Enable SAN booting in the server BIOS for the ports to which the SAN boot LUN is mapped.
For information on how to enable the HBA BIOS, see your vendor-specific documentation.
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Reboot the host to verify the boot is successful.