It appears to be working now. I'll summarize the issues I faced and their resolution.
Problem: I couldn't get a Maxtor 160G ATA/133 second hard drive recognized by Red Hat Linux 9.0. My primary drive is a Western Digital 180G ATA/100 drive. The physical hardware connection seemed to go fine with the drive recognized by the bios, and even by the Maxtor utility program and if I reran Red Hat installation. However, when I went to run fdisk /dev/hdb I would get an error "Unable to open /dev/hdb"
Solution: Upon the recommendation of vegeta_nc, I installed a Promise Technology Ultra100 tx2 ATA controller card and connected the drive to it. This allowed Linux to see the drive. The following steps were used to completion.
1) Ran "fdisk /dev/hde1"
a) Used the commands "p" to display the existing partitions
b) "d" to delete a partion I created when I ran the Maxtor utility.
c) "n" to add a new partition, selecting p for Primary and 1 for partition number and using the defaults 1 and 19920 for the first and last cylinders (just pressed enter at the command prompt). I stayed with the default Id type of 83 Linux native, because I found this supported the ext3 format.
d) ran "v" to verify the partion table
e) ran w to write the table.
2) then I ran "mkfs -t ext3 /dev/hde1". I had problems with the "-c" and "-v" settings, but without that it seemed to work fine.
3) I created the directory /mnt/hde1 using mkdir /mnt/hde1.
4) I then edited /etc/fstab and added the line "/dev/hde1 /mnt/hde1 ext3 defaults,users 1 1"
5) I rebooted and everything looks fine. I am copying files and testing the drive to see how it goes.
6) My next challenge is to try to reconfigure MySQL to use the new drive as its default directory. Hopefully that won't be as challenging!
Hope this helps someone else out there. As a newbie I appreciate these forums in treking through a new world! Best of luck and thanks to those that responded!