RAID drive recovery

I have a Flatbed server that has 4 hard drives installed in a raid configuration. Now the issue I am having is to try and recover data on one of the raid hard drives.

Now I was told that if one hard drive becomes non-responsive (freezing), the entire thing is buggered.

From the community, is there another way to clone that bad hard drive and get the system to boot up or will it continue to give me problems no matter what I attempt to do???