Harddrive diagnostic software

The list below covers most makes of hard drive diagnostic software to test the harddrive.....

http://www.hitachigst.com/hdd/support/download.htm
http://www.maxtor.com/en/support/products/index.htm
http://support.wdc.com/download/index.asp
http://www.fcpa.fujitsu.com/support/hard-drives/software_utilities.html
http://www.fcpa.fujitsu.com/download/hard-drives/#diagnostic
http://www.hgst.com/hdd/support/download.htm#DFT
http://www.seagate.com/support/seatools/index.html
http://www.samsungelectronics.com/hdd/support/utilities/utilities_index.html
http://www.csd.toshiba.com/cgi-bin/tais/su/su_sc_home.jsp

Or this one:
http://www.cgsecurity.org/index.html?testdisk.html