Updating the Intel® Rapid Storage Technology software driver in Windows* will not change the Intel® RAID Option ROM version. Updates for the Intel® RAID Option ROM version are usually provided via BIOS updates by the system manufacturer.
You may try resetting the disks to non-RAID first or try creating the RAID 1 in Windows* with Intel® Rapid Storage Technology as indicated in pages 30-33 of the user guide. Otherwise, contact the system manufacturer to find out what are the supported features.
http://download.intel.com/support/chipsets/imsm/sb/irst_user_guide.pdf