Thanks, @Pikmin
Here are the steps I had to accomplish with the help of one of our Linux gurus in the company:
- Deleting the virtual disk that was allocated as /dev/sdb and creating a new IDE drive with a 600GB partition
- Removing the VG with vgreduce --removemissing --force vg_ucs
- Using vgmerge to take all that fun new space and recreate vg-ucs
- Utilizing fdisk to re-imagine the extended volumes of /dev/sda based on what I found here- https://help.univention.com/t/how-to-extend-disk-space/10647
- Extending/Re-sizing the physical volume and the file system associated with /dev/mapper/vg-ucs_root and associating it with the new drive
- Reboot