How to detect healthy harddisk?

I got a harddisk problem. It’s BSOD so often and changing the data/power cable give no effect. I need to detect which one from 3 of my harddisk is not healthy because i have important unrecoverable files such as .doc and important memorial pictures.
any software?
Answer #1
I’ve used this and it worked for me.
http://www.google.com?t=1223096
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glenny.
Answer #2
HDD regenerator.