If your SP becomes corrupt, or you want to reset the SP to the factory default values, change the /SP reset_to_defaults setting then power off the host to implement the changes. This is new behavior. Previously you did not have to power off the host to reset default values to the SP. You need administrator permissions to perform this task.
-> set /SP reset_to_defaults=value
where value can be:
all – Removes all of the SP configuration data
factory – Removes all SP configuration data as well as all log files.
-> reset /SYS