Did you notice the section at the bottom of page 6 that asks you to set the RAID configuration to JBOD, prior to making any changes?
This is before the 'Set RAID Configuration' section, but it is clearly intended to be part of that section - not before it.
Your RAID configuration must be set to JBOD before the device can be reconfigured to RAID 0, RAID 1, or BIG. If you have set a different RAID configuration and now wish to reconfigure your RAID, please set the device back to JBOD before changing the configuration again.