Not show drive

[dharakadivar77]

I have one physical drive. the partitions are initially present in my laptop when I brought. the bios is also not showing all the drives. it shows only drive C and System reserved drive and it also shows the unlocated drive, but it doesn't shows the D, E, and F drives which initially present my computer. I have more important documents in partition E. This problem happen suddenly. How this happen I don't know. I switched off the computer properly but today when I opened the computer I am unable to see the partitions D, E, and F.

 

[alceryes]

Do you have an external drive that was unplugged?
Were all the logical partitions (D, E, F) on one physical drive?
Did you have a camera card in the laptop?