Hard disk is working even it dropped accidently

how do i take the hard disk self test to make sure is fully functioning? because i dropped my laptop accidently and i did ask forums on toshiba but toshiba forums won't help me!

i did checked on BIOS settings but it's not there

PLEASE REPLY!

i am using Toshiba laptop
Model: Satellite C55-A
Part number: PSCF6U-0EF09J
Operating system: Windows 8.1 basic update 1