General :: Auto Mount Not Working With New HD's

I'm using Red Hat in a work environment as the system that runs my Netbackup. My predecessor was using 1Tb Western Digital external HD's and they worked great but now were upgrading to 2Tb drives and I have to format them and make sure then work correctly.

I have been able to format them in Red Hat and they have worked with Netbackup however the only way I can get them mounted is by having them plugged in and then restarting the whole system. The older drives are completely plug and play.

Here are the steps that I have been following;

Then I set the file system type with;

Next I create the new filesystem on the drive with the command;

Then I finalize the format with;

Followed by a restart, which of course the drive comes up. But if I unmount the drive and remove it and then plug it back in nothing comes up. Trying to manually mount it doesn't come up with anything. I have attempted this with 3 different brand new Western Digital external HD's.

I've looked in the fstab and when I plug in the old hd's it comes up with the command to mount it. With the new one's its not there unless I do the complete system restart.