This message was posted on behalf of Intel Corporation
Based on the information you gave us, it seems to be that the hard drive that is showing up as “failed” was working under a different RAID structure, that is why it is not recognize as a member disk, so the next step that we can try now will be to get into the Ctrl + I menu, in there you will be able to see the hard drives, on the drive that says “failed” please use the option of “Reset to NON-Raid”, and then try the same steps you described previously in order to be able to use the new hard drives.
Also, if there is any important information on the drives we suggest to do a back up of it before trying any changes to avoid losing any data.
What is the model of the board?
Which Windows version are you using?
Please let me know the results of trying the step above.
Any further questions, please let me know.