To raid or not to Raid that is the question?

At my company we are using single hard drives
and over the last year and a half 3 of the 6 have gone bad

each time this happens we have to reinstall all of the softwarewhich takes a day or so after we get the hard drive.

i was wondering if we should go to raid to get rid of down timewhen hard drives go down?

anyone using raid and happy or not happy with it?SolidworksAdministration