Icrontic takes a look at data recovery techniques:
Even with the latest hard drive technology, data loss happens. The best defense is a solid and frequent backup plan. We know that doesn't always happen, though. When data loss strikes, we move quickly into panic mode, trying to retrieve your important files. There are a variety of tools and services now readily available that can help you get them back. We're going to explore data recovery options, from the mundane to the expensive, and weigh the pros and cons of each.
There are a couple critical procedures to do before you can begin to recover data..