This happen when I got home from school.
Early morning at school, I still perfectly use Windows in Macbook Pro (early 2011). So I did a hibernation before packing it up. Then when I was gonna use it at home, I wasn't able to boot back to Windows and saying "No bootable device -- Insert Boot Disk and Press any Key". I know that this was cause of no HDD was detected or there is no OS installed.
Now when I try to boot into MacOS, it was also not detected. ( I'm holding the Option key to choose Startup Disk ) It show the Internet Recory option only.
Please help me! I got a lot of projects to do. :s