In order to better help you, could you please tell us what is the platform (processor and chipset) related to this consultation?
Thanks in advance for your collaboration to solve this inconvenience.
Thanks again for contacting Intel Embedded Community.
The information that may help you is stated in sections 5.1 and 6.4, on pages 21 and 28 of the http://download.intel.com/support/chipsets/imsm/sb/irst_user_guide.pdf Intel(R) Rapid Storage Technology User Guide.
Please let us know if this information is useful to you.