Checking raid fail

[ash_scotland88]

Currently I have raid 0+1.
This afternoon started up my computer, it then restarted seconds into the start up and is sounding a lot quieter.

How do i go about checking to see if one of the hard-drives has failed?
Would/should something tell me that its happened?

 

[ash_scotland88]

cheers
when it started up the 2nd time, tried to keep my eye out when it listed the hard-drives, and it looked all ok. Probally just me being paranoid.
also cant see the inter matrix etc whic I'm sure i used.

MB is a gigabyte uhm..blank....dq6 x38 totally just draw a blank on it.