HardDisk issues

[Hb-Tech]

Harddisk problem my pc.
Harddisk is not dected. This is imported Data Harddisk and transfer data new Harddisk .But again My Harddisk is Not Dected....
Please Help me....

[djr33]

More information. (Just as you may want a longer reply, we will need more information to help.)

What system? What kind of harddisk? This is a secondary drive? Can you boot? Can you access BIOS? Do you have/did you install drivers?