Set the ESXi Host HCA First in the Boot Order

1. Enter the ESXi host's BIOS.
2. Select the option ROM in the boot devices list.
3. Move the option ROM higher than all other devices in the boot order.
4. Save and exit the ESXi host's BIOS.

   Setting the server to boot through the HCA option ROM populates the iSCSI boot firmware table with the disks on which to install the boot image.