> If your Hard Drive was working and then all the sudden it is not recognized (seen), by your system then it is bad news. Try changing the Hard Drive connection with the CD ROM connection just to make sure it is not the connection that is failing. If no success, go to the Data Recovery page to see if there is anything you can do to retrieve your data.
If you are installing a new one then read the user manual (you can get it on the manufacturer's website).
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