At boot-up you will see the RAID BIOS going through a detection process. There will be a message stating something along the lines of "array functional" or something to that effect. That's not what it says, but I'm at work right now and can't reboot to see what it actually says.
As long as you are not receiving an error message, you are OK.
The true test would be to disconnect one of the drives. The system will boot and you will get an error message that there is a problem with the array. You can continue on and the system will boot off the single drive. Do nothing except turn the system off at this time. This is one of the niceties of RAID 1. If a drive fails, you can still function.
You should then try this with the other drive. You'll get same error message and it should boot. Now you know for sure your array is functioning as it should.
You need to rebuild the array however. The controller knows that you had a HD "failure" and should actually prompt you for a rebuild. The reason being that if data has changed, you would obviously need to duplicate those changes on the other drive. Synchronization is the proper term for this I believe.
Now, there should be a utility that will run in Windows that will verify all this for you without going through all this rigamarole. It may be on the CD that came with your board or add-in card. It most definately will be available at the website of the manufacturer of the chipset, motherboard or card.
These can be run as a service or put in your start up menu, whichever suits you. I find them to be resource hogs and generally do not install them. I will get a message at boot-up if there is a problem and rely on that in it's place. I'm not running any "mission critical" software at my house, or my wife's business for that matter. I don't need to continuously monitor the array.
I'd install the utility, verify that all is OK and remove it. But that's just me.
Glad we could help you out!
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