Yes this is possible. You can do it in a command terminal very easily. To do it you must have root privileges so you want to either su to become root or use sudo to mount the drive.
First you need a mount point. I like to just create folder in /media.
sudo mkdir /media/drive2
Next you want to find out what the device assignment is for the drive. to do this I like to use fdisk
You should see /dev/sda or /dev/hda for your primary drive. You should also see your 2nd drive listed as /dev/sdb or /dev/hdb
Assuming your 2nd disk is /dev/sdb you can mount it to your mount point by using the mount command. The mount command works like so
sudo mount -t [filesystem type] [device partition to be mounted] [location of mount point]
so assuming that you have 1 partition on your 2nd drive and it is a Windows ntfs partition you could mount it like this
sudo mount -t ntfs-3g /dev/sdb1 /media/drive2
Then you can view the contents of the 2nd drive by going to /media/drive2