Usually, physical damages to a hard disk such as head crashes or failed motors cannot be repaired by a typical computer user. Physical damage is the worst form of damage to a hard disk and it often results in some, or all, of your data being lost. In most cases it is not possible to recover all the data.
If your hard disk has minor physical damage, you can use data recovery programs such as PC Inspector File recovery and see if they can recover your data. Most of the data recovery programs for hard disks are easy to install and user friendly. However, when you decide to purchase data recovery software, it is a good idea to go for something from a trusted software vendor.
However, if your hard disk has suffered severe physical damage, then you need to approach a technical expert or seek a data recovery firm to recover data from the disk. Many disk data recovery companies use modern instruments like magnetometers to recover every possible bit from the disk. These companies charge a large sum of money to recover data from a damaged disk so you should decide whether or not the data on your disk is crucial and whether you really want it back badly enough to give them a lot of money.
You can get data recovery deals by contacting local forensic data recovery companies that do most of their jobs for people involved in small court cases. These companies work on a smaller scale, which is why they charge less, making the job more affordable for small clients.