How to confirm Hard disk is perfect no problem?

How to confirm any SATA/PATA Hard disk is perfect no problem? no bad sector on any other problem. I'm purchasing just 2 month used SATA HDD from a friend in less price.

How can i confirm hard disk will work perfectly, current condition is healthy.

Hard drive manufacturers diagnostic tools: hitachi / samsung / western digital / seagate (& maxtor) / fujitsu (now it's a toshiba brand but I don't have found a specific toshiba tool)

http://www.grc.com/sr/spinrite.htm

If you're using Windows, I believe there is a built in utility to check for bad sectors under "My Computer".

I think this how-to explains the steps.

http://www.ehow.com/how_5094803_check-bad-sectors.html

You can try the following alternatives. They're all freeware.

• Active@ HD Monitor
• HDD Health
• Disk Checkup
• HD Tune
• SeaTools