It may surprise you but many disk failures are not random or instantaneous but rather are preceded by a relatively slow degradation in disk performance parameters. This degradation can be detected using a monitoring system called S.M.A.R.T that is built into many modern drives and their controllers. HDDlife is a utility that runs in background and monitors the health of any hard drives on your system that support S.M.A.R.T. It can give you early warning of an impending failure which gives you time to backup your data and change the drive. HDDlife only works with internal IDE and Serial ATA disks. Free for non- commercial use, Windows 2K or later, 1.5MB
http://www.hddlife.com/
http://www.storagereview.com/guide2000/ref/hdd/perf/qual/featuresSMART.html
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