Drive Diagnostic Utilities

Every major drive manufacturer have their drive diagnostic utilities. These utilities will allow you to test & diagnose your drive. Some utilities also allow you to "low-level" format (write zeros) or enable/disable certain features on your drive.


Hitachi / IBM - DFT "Drive Fitness Test"

http://www.hgst.com/hdd/support/download.htm

Works with all manufacturers

Western Digital "Data Lifeguard"
http://support.wdc.com/download/index.asp#dlgtools 
Works with WD drives only

Maxtor "Powermax"
http://files2get.com/software/soft2/dyski-twarde-(hdd)-narzedzia-firmowe/powermax.exe
Works with all manufacturers

Fujitsu "FJDT"
http://www.softpedia.com/get/System/Hard-Disk-Utils/Fujitsu-Diagnostic.shtml 
Works with fujitsu models only . See also Tosibha link

Samsung "hutil"

http://www.seagate.com/support/downloads/ 

Now that the sale of HDD division of Samsung Electronics to Seagate Technology Plc("Seagate") has been finalized, Seagate will provide all customer support including the warranty service of Samsung HDD..

Seagate "Seatools"
http://www.seagate.com/support/seatools
Works with Seagate drives only

Toshiba 
http://storage.toshiba.com/storage-services-support/warranty-support/software-utilities
This diagnostic tool is available for use by customers who feel their Fujitsu Branded Toshiba hard drive may not be operating normally. It is only designed for use with Fujitsu Branded Toshiba ATA/IDE hard drives.