...I tried Crystal Disk Info (free) on my HD, & it came back with an issue, & as I scrolled down the page I noticed the name of that issue attached to a fix-it program (oh great), but then I noticed it cost $30, (oh but of course), so I'm convinced 3rd party tools are going to try to get your money...
CDInfo is 2mb, 1 program for all, 3rd party etc. - further surfing I found Seatools for Windows, 20mb, just for my model#, NOT 3rd party, & FREE too- I ran all the tests & all came back perfect, no issues
http://www.seagate.com/support/downloads/seatools/
Here's a page of links for other brands that might be of interest
http://pcsupport.about.com/od/toolsofthetrade/tp/tophddiag.htm
good luck...