Macbook pro 2010 not showing hdd in disk utility but shows the same in usb

Macbook pro 2010 not showing hard disk in disk uility but same hdd shows when connected to usb original drive, also installed new hard disk 500gb, same result, but connected old hard disk of 500gb shows in disk utility and also able to installed os on it, tried installing lion 10.7 on it with the original and new hdd but not shows in  disk utility pls help for this problem

I'm kind of experiencing the same issue now.
A few days ago, when starting up my Mini, I would get a warning that the system didn't recognize the drive with the option to ignore. I hit ignore and all seven drives would mount. Because I have seven drives attached, I had no idea what drive was giving the warning.
Today that drive failed to load up at all. I ran disk utility and after several tries, it said repair was successful yet the drive will not mount.
I'm currently running recovery software on it to see if I can copy everything from it to another drive. It is a fairly old drive, about 3 years old so it's time is short.
I don't have any suggestions but mine does show in disk utility.

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    Ranban wrote:
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