I've worked with Intel Raid quite a few times, and I can tell you this: if you delete that array, the disks are reset to non raid, and all your data goes bye bye.
Raid 1 means mirroring the data, so both hard drives contain exactly the same data. Try maybe physically removing one drive's SATA cable, and try booting up. The Raid may complain, but it should start up, as that is what Raid 1 was primarily designed for I think. Try it with either of those drives. If you can get into Windows after that, back up everything.
Once you have a backup, put bith disks in, delete the arrray, and recreate it if you want/need it. From there you should be able to do a restore and have things working again.
Hope this helps, and good luck.