Format HD via SSH

Please can anyone tell me if i can format a HD in my server via SSH.... should be possible i think....
If yes how?
Need to format e 2° HD for backups on a server and when i do it the first time via WHM it shows me a 99MB HD instead a 60GB.
So i have to format it again....
Format HD via SSH

Thanks for any help

 

 

 

 

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