In my experience, I have only ever needed a UUID in fstab to mount a local drive. I have never needed a UUID to mount a folder from its drive on a host machine. My fstab in that case is just:
192.168.x.x/folder_name /mount_point nfs defaults 0 0
Is one of the machines on your network a Windoze? If not, I don’t understand why you’re using Samba.
I moved and resized the ntfs and swap partitions on this machine previously. Mint promptly stopped recognizing them. I had to use a bootable disk to go online and figure out how to correct it.
First, I had to copy down the commandline instructions to find the UUID of the partitions. Then I had to modify the grub bootloader to re-see them. After several tries. And a few hours of work.
In Mepis, the ntfs partition was sda5, and the swap partition was sda6. No matter how many times I resized and moved the partitions, Mepis always booted up and recognized them no problem. Plus, I could easily modify the menu.lst file to disable booting from ‘doze, and re-enable it at any future time in case I had to work on a particular project that needed it if I had to as well as modify the boot wait time.