Thanx for moving my post, wasn't sure where to put it. :)
I think you are right, it probably is failing but everything the previous poster said happened to me. I also had a power failure, they are common where I live. I have a APC battery backup which shut my computer down and thats when it started happening. I went to maxtor and downloaded their diagnostic and it found 2 minor problems in the registry, fixed it and all was fine. Few days later the hard drive was missing... thats a shame as my hard drive is less than a year old because my 2 year old hard drive quit on me. I find it odd that 2 hard drives are failing in such a short period of time. I have another computer that is 9 years old that still uses the same off brand hard drive with no problems.