Adding a new hard disk in linux 9

i have a dual boot operating sytem winxp & linux 9 on my desktop and i want to see the additional hard disk that i have.in win XP on my desktop i see the additional hard disk as drive d but when i check in linux 9,i did not see the additional hard disk.i try to use the ‘new terminal command’ to mount it manually but it says that the device mounted does not exist,can you please give me an idea on how to add the additional hard disk manually,except on terminal command