HDD not mounted after Erase Free Space

[php2504]

HI everyone,

I urgently need help.
I went into recovery mode because i wanted to coean my MacBook Pro.
Then I chose Disk Utility to delete the other partitions I had and I chose after the normal "Erase" also "Erase Free Space".
AFter it finished to erase free spwace, some hours, I came back I tried again "Erase" for certainity.. and then... Yhe HDD resulted not mounted the details pf the space inside the HDD are signed by "---" and I really don't know what to do.
Can someone help me??

Thanks
Philip

PS if i click on "mount" it says: the disk... could not be mounted. Try running first aid on the disk and then retey mounting.

I teied first aid and it says OK and OK.. whats wrong???

 

[Someone Somewhere]

You didn't just erase the free space, you erased the whole drive. Including the OS.

Follow this guide: https/support.apple.com/en-nz/HT204904

 

[php2504]

I know! I did it cause i wanted to reinstall OS from beginning.
But the problem is about the HDD not the OS.

 

[php2504]

Seems everyhtings solved now.
I rlove creTed the partition then restarted the mac, entered into recovery mode again and the HDD resulted mouted. Now im reinstalling the OS. Lets hope everythings fine.