When I type mount at the prompt, I get the drives that are mounted.
I have two drives in my system, and I am trying to mount the second one.
I am trying to mount doing the following:
mount /dev/sda2 /hdDrive #hdDrive is a sub directory that has already been created
Typing mount doesn't show it to be mounted, but when I try to mount it as above, it comes back already mounted. What am I doing wrong?

What OS exactly?
Are you trying to mount as a regular (unprivileged) user, or as root?

It is Linux, and I am logged in a root.

"Linux" is not an OS.
I said exactly.
If you want help, you need to answers questions. We're all volunteers here.
or see https://www.google.com/?gws_rd=ssl#q...t+sda+in+linux
first hit.

You shouldn't be helping people even voluntarily if you don't even know that Linux is an Operating system. I would rather not even have help than to be dealing with someone so rude. I don't use Linux, did Unix some 30 years ago. It is not fresh in my mind, and I am tying to get some legitimate help. But I don't have to be a wizard to know that Linux is an operating system.

I believe and assume that Habitual was asking what linux distribution/version you are running.

When trying to mount the partition did you see any error or warning messages?
It is more common to use UUIDs or labels instead of device IDs, since with modern computers drives can be recognised in any order. So are you sure you are specifying the correct drive/partition?

Please post your /etc/fstab file as well as the output of the console command
blkid.

Thanks Michael. I appreciate your professionalism.
I had a problem with a system running Linux, and so I have created an identical system on another disk. I have both in the system and want to one directory/file at a time identify what caused my problem. So I am obviously booting form one disk, and then want access to the other going back and forth.

To be specific, I believe I am using Centos 6.5. Would that make sense? It says that when booting up.

When at the prompt I do ls /dev/sd*
I get /dev/sda /dev/sda1 /dev /sda2 /dev/sdb /dev/sdb1

I am guessing that /boot is looking at /dev/sda, and / is looking at /dev/sd1 or /dev/sd2. Again, only a guess.

But I want to be able to look at /dev/sdb1

I don't deal with this at all, and am drawing on some of my unix days at Bell Labs. I'll know how young you are by if you have ever heard of them before.

Again. I appreciate your help.

sda references the entire disk vs sda1, sda2 individual partitions.

You did it post the output of the fstab or blkid so I can not tell which drive is the running system and which is the "copy".

The default partition scheme for CentOS uses LVM (Logical Volume Management) whereby /boot is sda1 and sda2, the LVM partition contains / and swap.

Your second disk sdb only has one partition which is not wrong but as a beginner manual partitioning can be a bit of a daunting task.

Please try

If you want to see sdb1, change your mount to: mount /dev/sdb1 /hdDrive

The command above would mean you have the directory hdDrive in the root of the filesystem so that it would show when your run: ls / What happens when you try the above command?

Do you mean sda2 doesn't show as mounted or nothing shows mounted on hdDrive?