I have installed windows 10 and have an Asus H170 Pro (intel H170 chipset with Intel Rapid Storage 14.6 drivers & UEFI bios).
I have 6 discs , 2 X RAID 1, but with my current 2 discs (2 X WD 2 GB) I have not the 'CREATE' option in the Intel Rapid Storage program.
Although my other 2 RAID 1 arrays were created without a problem. I can create the RAID 1 with my 2 boot discs in the boot part of the Intel rapid Storage (with CTRL-I) but not in windows.
What can this be ? I installed windows 10 in UEFI mode.

I can create the RAID array of my boot discs, but only in the Option ROM of the boot screen (by pressing CTRL-I at booting).
Not in Windows . (no 'CREATE'). When I create the array in the option ROM , does I loose all the data of these 2 discs for RAID 1 ?
Or do I better update the UEFI "raiddriver" of my UEFI BIOS (modding the BIOS) to version 14.8 ?

Thanks, but where can I find the utility in my UEFI BIOS ? I only see the option in the UEFI bios :

Intel Rapid Storage

YES / NO

I can switch between 'yes' and 'no'.

Thanks. It worked. I now see the "Intel Rapid Storage" and the options under the "Advanced" tab. Only the strange thing is that I still can only create the RAID 1 array in the BIOS (Option ROM or UEFI "RAIDDRIVER"). I still do not see the "CREATE" command in windows 10 64 bit for my 2 discs in the Intel Rapid Storage software.

Not big, but a problem, since I cannot create a backup for the moment. If it worked in windows , I could easily make the mirror (RAID 1) (select 'Create' and choose the option to keep the data on the disc on port 0).

that helped. thanks