This link is a good place to start to find out if you have a hard drive failure and are in a target="_blank">What Do Need To Know Data Recovery 101 After that if the data is not worth recovery, or if that is not your priority then you can see if you are still under warranty. If not you should be able to replace the drive yourself and start over. It really all depends on what your goals are here, but first is diagnostics. If that is important to you but you are unable then you can always contact a professional data recovery company like SERT Data Recovery or Kroll Ontrack.
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This link is a good place to start to find out if you have a hard drive failure and are in a target="_blank">What Do Need To Know Data Recovery 101 After that if the data is not worth recovery, or if that is not your priority then you can see if you are still under warranty. If not you should be able to replace the drive yourself and start over. It really all depends on what your goals are here, but first is diagnostics. If that is important to you but you are unable then you can always contact a professional data recovery company like SERT Data Recovery or Kroll Ontrack.