Suppose that you create a fake Time Capsule with a Centos Server
And suppose that you get a lot of new hard disk, and one of your fears is that one day you need to remove all hard disk from the server for make a maintenance operation. Will you remember the order when you want to add it again? Probably no, and when you switch on the server the mount points has been changed and a lot of Macs are overwriting the last backup or all the time capsule users call you saying.
My time machine shows a warning message,
Where are my backups?
I need my backups now because i was editing a file and I need the version of 24 hours ago NOW.
The solution is use UUID
I added the new hard disk one by one, create the needed partitions
fdisk /dev/sdx or gdisk /dev/sdx if you want gpt
mkfs.ext4 /dev/sdx1
blkid