Hard drives are mounted but don't know how to access them
 

I hardly know anything about Linux and I am trying to access the 4 hard drives of my server that is running Debian linux 1.3.

At the login prompt, I type in the word "root" and that seems to get me in.

When I use the mount command for the hard drives, it says they are already mounted. But I don't seem to be able to access the hard drives by using the change directory (cd) command to a hard drive like when I try the command
cd /sda1
to get the directory of that hard drive. All it says is that there is no such file or directory. Is there a special command to access the hard drives or is there something else I need to do.

The command DF shows the used and available space of what appear
to be the hard drives.
sda1
sdb2
sdb3
sdc1

How do I access them?

Things have to be mounted on a mount point. The mount point is usually the last column when you do 'df'.

So, for example sda1 might be mounted on /boot. cd to /boot to have a look around it.