Harddisk Erased After Mistake

Hello,


I made ​​a big mistake:


I was on the lock tab and note that the proposed location was completely false. I try to relocate; nothing works. I see the button "delete data" I say. I will remove the data location. A message appears: are you sure to delete this data? I say yes


Computer reboot and later I read erasing the hard disk!


OUAHHHHHHHHHHHHHHHHHHHH!


I unplugged my computer soon.


Questions to the forum:


is it possible to stop this process?


if not, will it be possible to reinstall everything?


I have several hard drives backup (physical disks, I'm not talking about partition). Will they be deleted too?


Thanks