Impossible to mount a partition on second hard disk

[Marc]

First sorry for my english.
It's my first installation of the Core 2.  
I have a problem because I cannot mount a partition on my second hard
disk.  
When I make a mount /dev/hdb7 (or other) the answer is... mount: cannot
locate /dev/hdb7 in /etc/fstab or /etc/mtab 
When I look in /etc it does not have there a fstab or mtab.  

Thank you for your answers.

Marc.