The "uniqueness" of UUIDs

[Roger Price]

Sorry, the formatting was messed up and the message unreadable.
On Tue, 26 Nov 2024, George at Clug wrote:

"$ lsblk -f" output is very nice !   Thanks.

I tried this and noticed UUID duplication in the output. I attach a small text 
file which shows what I saw. UUID sdg6 = UUID sdh6 !

 NAME    FSTYPE            UUID
 ...
 ├─sdg6  linux_raid_membe3 f5e37a29-357a-e3f2-c731-e29eddce5e
 │ └─md3 ext4           1.039c24711-ab43-497c-bf3e-12b4032575a.4G
 ...
 ├─sdh6  linux_raid_membe3 f5e37a29-357a-e3f2-c731-e29eddce5e91
 │ └─md3 ext4           39c39c24711-ab43-497c-bf3e-12b403257.4G

If I wanted to retire /dev/sdg6 from the Raid array, I would not be able to use 
the UUID, only the unique SDxn.

Aren't UUIDs supposed to be unique?  RogerNAME    FSTYPE            FSVER LABEL          UUID                             
    FSAVAIL FSUSE% MOUNTPOINT
...
├─sdg6  linux_raid_member 1.0   10.218.0.100:3 
f5e37a29-357a-e3f2-c731-e29eddce5e91                
│ └─md3 ext4              1.0                  
39c24711-ab43-497c-bf3e-12b4032575ac  758.4G     7% /mnt/home
...
├─sdh6  linux_raid_member 1.0   10.218.0.100:3 
f5e37a29-357a-e3f2-c731-e29eddce5e91                
│ └─md3 ext4              1.0                  
39c24711-ab43-497c-bf3e-12b4032575ac  758.4G     7% /mnt/home