Cant add folders onmy LV

[carlo1775]

NOOB to reddit and linux. Be nice, please:

Ubuntu Server 14.04


I have a new ubunutu install. Headless ( but using VNC GNome for some GUI stuff)
I installed a primary SSD for the OS I added two 1 TB hardrives for extra storage
I added those 2 hards to a physical volume made one logical volume out of that.
mounted the Logical Volume (LV) to /mnt
It shows up in my system. So i can see it. However, i cant add anything to it or create folders.
So this is a permissions issue that i screwed up somewhere along the way.

Can any one help? Once again, new to linux. So i will need help with commands if you will need the output of something.
I'm good at copy/paste. Really good

[carlo1775]

Command

sudo chown carlo:carlo /mydata_lv

worked....