hard disc

[Jahmon]

Hi,

I'm totally new to linux and i choose to start my linux experience with (k)Ubuntu.
I have 2 hard disks
the 1st one is divided in 3 partitions 1 with windows and 2 with files
the 2nd is with linux divided in 2 i think ( i selected that linux could use the complete drive)

The installation was OK but now when i want to open my hard disk containing files i get :

Could not mount device.
The reported error was:
mount: ne peut repérer /dev/hda5 dans /etc/fstab ou /etc/mtab

(sorry it's a bit in french )

What can i do to be able to open it?
i tried opening /etc/fstab with "Kate" and i saw hdaX weren't in the file but i dont seem to have write permission/acces...

can someone help me??
i've been searching for a while but since i'm totally new to linux i have some difficulties... i'm not stupid but linux isn't easy when you're totally new to it, specialle all those "root" acces super user etc ...


Thanks already for even reading me