Is your computer asking you if you want to format your hard drive?  I hope you didn't.  Although most of the time it can be the level 2 recovery  sometimes it can fall into the level 3 recovery.  First we check the logic board and firmware for anomalies before searching for a solution internally.  Often times we find it to be a simple adjustment.

What can cause this.

1. Partition table problem (Level 2)
2. Firmware issues (Level 2)
3. Read Write Head Issues (Level 3)

This is a common problem encountered by our customers.  In over a dozen years we have worked on hundreds of these situations.  Send us your drive and let us help you get your data back now.