Raid Degraded!?

This image should pretty much explain it all. I had to do a hard-reboot cause of a crash in Windows Vista x64, and when it booted it told me my RAID was degraded... current setup is 3 SATA Seagate Barracuda 350GBs, two in a mirrored RAID setup and one data disk... don't exactly know how it was set up since I wasn't the one who did it.

Pretty much just thinking... uhm... help? Please? I never bothered using RAID arrays before this PC so I am completely clueless when it comes to them, no idea what has gone wrong. I'm guessing the fact that I have a mirrored RAID just saved my ***, but beyond that, how do I fix it?

http://johannkwan.com/screenshots/raid.jpg

 

Anyone?

 

This could be caused by a bad connection, check the leads to the drive that is not functioning when computer is powered off of course.

 

It could also possible be Heat problems, bad sectors, or Dying HD........Have you done CHKDSK or some other similar utility to check your HD's

 

Okay, I will try all of those things (doing the rebuild being the last) tonight when I'm done work. Thanks guys, I'll let you know how it goes!

 

I still haven't solved this though I am looking into rebuilding the mirror. Problem is the JMicron RAID BIOS tool seems to not be working for some reason. Supposedly, according to everything I've read and my mobo manual, at this point in the POST: http://www.johannkwan.com/screenshots/raid2.jpg it's supposed to prompt me to hit Ctrl+J to enter the RAID BIOS tool but it just says "Press any key to continue ..." and boots to Windows.

Hopefully I'll figure it out soon, If that doesn't work I'll probably see if I can use Halo's suggestion.

Just filling in details, thanks for all your help so far guys! =)