Should I split a big (8TB) backup disk into more than one partition, or not?

[Chris Green]

I am in the process of setting up a new backup system to replace an
existing one whose 3TB disk drive is over 50% full now.

I have bought an 8TB disk drive for the new system, the system boots
and has its OS on a separate drive (i.e. the 8TB drive will be purely
for backup, no boot partition, no /usr, no /home).

I'm wondering if there's any advantage to splitting the 8TB into a few
separate partitions as opposed to one big partition.

Obviously one big partition is more flexible in that all the spare
space is available 'everywhere' so that pushes towards one big
partition.

I guess separate partitions might be said to be 'safer' if something
goes wrong, a corrupt partition wouldn't lose so much data.  However,
unless one duplicates data across partitions I'm not convinced this is
a big advantage.

As you can see I'm leaning towards one big partition, can anyone see
any major disadvantages?

-- 
Chris Green