I am running Ubuntu 10.04.4 thru VMWare Workstation. I added a second virtual hard disk drive, which is found under /dev/sdb , as shown below

How do you mount this to anywhere? (e.g. /mnt/sdb).
When I tried sudo mount /dev/sdb /mnt/sdb -t ext4 
I get the error message back 
wrong fs type, bad option, bad superblock on /dev/sdb, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so
mountcommand.