How can I set my server to check hard drive regularly

view story

http://www.linuxquestions.org – Hi Guys... I have a couple of servers which give me no trouble. However, if I have a power cut, or similar, my servers insist on checking the hard drives after n days since being checked. Since these are Internet servers I can't afford for them to be down too long. Is there a command that will check my hard drives on a regular basis so that the above circumstance can be avoided ??? (HowTos)