Now I want to display the contacts of the slave HDD (so I can copy few files). How do I display the second (slave) HDD?
I am assuming that you are referring to IDE drives, due to your referral of a "slave" drive. IDE drives are usually referenced as /dev/hdx where x = the letter of the connected drive. For example, the primary master is /dev/hda, the primary slave is /dev/hdb, the secondary master is /dev/hdc, and the secondary slave is /dev/hdd.
As root, type "fdisk -l". This will list the partitions of the drives connected to your system. If this is a primary slave, it is most likely "/dev/hdb". If you have multiple partittions, you will want to choose which partition(s) to mount. You will need to create a directory for each partition that you want to mount. I might recommend creating /media/hdb1 /media/hdb2,etc. Then you can mount each partition by typing "mount /dev/hdb1 /media/hdb1" and "mount /dev/hdb2 /media/hdb2" .. etc.
Hope this helps.
Barry