Okay Ande Sounds like you are a little frustrated.
Firstly there are NO drive letters in unix or linux. So forget about C: D: A: etc.
What's a mount point?
A file's a file's a file. Basically a mount point is where pyshical disks and partitions on your system put themselves. You don't need to worry too much about the complexities of it for now. Basically, you need to know that your second disk is going to be on a mount point. Which YOU can choose.
Type 'cat /etc/fstab' to see how your system is set up. Mine is: (cat displays the contents of file - top command)
/dev/hda6 swap swap defaults 0 0
/dev/hda5 / reiserfs defaults 1 1
/dev/hda7 /home ext3 defaults 1 2
/dev/hda1 /windows ntfs ro 1 0 #ro = read only
/dev/hda9 /fat-e vfat auto,gid=100,umask=000 1 0 #umask to set default permissions
/dev/cdrom /mnt/cdrom iso9660 user,noauto,ro 0 0 #user allows anyone to mount it
/dev/uba1 /mnt/stick vfat auto,user 0 0
devpts devpts gid=5,mode=620 0 0
proc /proc proc defaults 0 0
This is a list of where the disks (left column) or mounted (second column). The third column is the file system type. ntfs, being a windows partition. vfat a fat32 (ms windows/dos) partition.
As you can see I have /home 'mounted' at /dev/hda7 with the file system type of ext3 (linux). The is a partion on my first hard drive (i only have one). you can tell this as all my partitions are listed as /dev/hda?, expect cdrom and usb stick. Don't worry about devpts and proc for now.
So, if I wanted to add a second disk, i would have to
1) physically install the disk
2) run 'hdparm -l' which will tell me about the disks/partitons on my drive.
3) Run 'cfdisk' which is much easier than fdisk, and will enable me to format you new drive. Which will be /dev/hdb
4) decide on a mount point. /new maybe? /stuff Whatever. Note don't try to mount it where the is an existing partition mounted. I could umount /home and remount it on /hda5, then use my second disk to mount /home. but i'll keep it simple.
5) edit my /etc/fstab file (as root). 'pico' or 'vi' maybe. to include a line like:
/dev/hdb1 /stuff ext3 defaults 1 2 (the second last column is about dumping and the last column is about file system checking - don't worry about those '1 2' is fine for your second disk until you are a wizard.)
then type 'mount -a' (mount all i.e '-a' mount points in /etc/fstab that aren't already mounted.)
It's important to note that i would have had to created a folder called /stuff in this example. you have to mount to a directory that already exists.
chmod 777 stuff (change permissions)
You sound keen but very windows- centric. Stick at it and you will be laughing at C: drives before long. If you want to use more than one disk at the same mount point then we are talking about things like LVM and RAID. Lets not.
Anyway, mount points are central to your system. As is /etc/fstab.
Don't despair there is plenty of stuff for new people out there. And people are willing to help.........
check this out for some basics and a guide to vi:
this may be useful:
Hope this has been of some help.............
To start a progam for the command like type ./programme where program is the name (if you are in the right directory)
or /usr/lib/mozilla which would start mozilla (if you where in X)
type 'startx' to go graphical if you have this intalled........