Intel(R) Rapid Storage Technology (formerly Intel(R) Matrix Storage Manager) does not provide recovery options for failed RAID 0 arrays.
In this case the data on this volume is not longer available and cannot be recovered.
Most likely the metadata on one of the discs was corrupted when the hard drive was initialized with no RAID mode enabled.
At this point you may need to recreate the RAID 0, install the operating system on it and access the data on the RAID 1 once the new operating system installation boots.
Thanks for your answer Diego.
It's a pity there is no way to get back that false non member disk into the array as I am sure all data are still there.
I could have try after that to rebuild MBR using system console...
Anyway... thank you for answering.