newby? - adding a hard drive & space to a file system

[noober]

Can someone give me a 'add a disk drive for dummies' lesson? I am installing a disk drive this week and I want to add the space on it to a file system called /nearline.

Its hard to know exactly what to do and the order to do things in because the manuals are so command and syntax centric and I am having trouble putting things together in steps. Any help is appreciated, including 'hey dummy look in this book...' assuming its not just a command reference.
-thx

 

[bi]

If you have raw disks, I'm not sure all that free space that shows up on your lspv output really is free. I don't have that much experience with raw disks, however.