hard drive diagnostics needed

Hi, I am looking for a good, and free, hardware diagnostic.  It is for a regular (not Solid State) hard drive, from Western Digital.  This is a regular drive, not an external one.  An online diagnostic would be ideal, but if there is one I need to run on boot, that would be OK, as well.

Thank you very much for the help.
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Phil DavidsonCommented:
You may want to look at these options (including one from Western Digital):


There are options besides those listed too.  But all of the above are free.
Have a look at Hard Disk Sentinel from http://www.hdsentinel.com/
It reads the SMART data from the drive and gives very useful information on the state of your HDD.
dbruntonQuid, Me Anxius Sum?  Illegitimi non carborundum.Commented:
Get the UBCD https://www.ultimatebootcd.com/

Totally free with more diagnostics than you can shake a stick at.  Has the manufacturer's utils on it as well.
Dave BaldwinFixer of ProblemsCommented:
I've been using the free version of HDTune http://www.hdtune.com/ .
I use the free version of Speccy,

It shows all the basic info for each drive, including SMART info.

It also gives you detailed hardware info for all your system hardware, including Hard Drives, Motherboard, CPU and Graphic Temperatures.

I honestly don't know what the paid version adds to the free version, the free version has everything i need.  

Thanks Piriform.
here the WD lifeguard diagnostis that you need :  http://support.wdc.com/product/download.asp?groupid=608&sid=2&lang=en

you also find it on the UBCD

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Always use the manufacturer's utility, not any 3rd party stuff. As mentioned already the manufacturer's diagnostics are included on the UBCD, those are tools that are directly booted into (you could call them "DOS Based"), but many manufacturers also offer tools that run directly within Windows. You need the windows version if you are diagnosing an external (USB) disk. Never run the Diagnostic on the disk you have booted from (so for internal disks on which Windows is installed use the "DOS based" version). The running OS can cause problems while diagnosing it, as it is accessing the disk all the time. Additional internal disks that don't have the OS on it, can also be tested using the windows tool.
noxchoGlobal Support CoordinatorCommented:
Ideal diagnostics tool for your HDD is the one made by the same vendor who made your HDD. In other words it is Western Digital. And all HDD vendors have the diagnostics tools for their hard drives.
So go on with WD Diag tool, you can always get it from WD website.
that's why i posted it above..
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