A "quietish" vibration type noise sounds more like a hardware problem that a software application such as Diskwarrior cannot possibly correct. The only practical correction being a new hard drive.

Having said that, I know that when I am chasing difficult or mysterious problems I often begin to hear or see things that had been there all along, but I simply had never noticed before. So your "quietish" vibration type noise may or may not be anything.

There are tools that can help detect impending drive failure:
  • Apple Hardware Test (that comes on the OS X install disk that came with your Mac), Diskwarrior, and Drive Genius all have a complete suite of drive hardware tests
  • TechTool Pro, like the others, has a full suite of drive hardware tests and in addition provides a far more fulsome readout of the S.M.A.R.T. values than any of the others. A drive may be failing and still pass S.M.A.R.T. but the TTP readout will flag deteriorating parameters before actual failure.

If we knew what it was we were doing, it wouldn't be called research, would it?

— Albert Einstein