what is the safe <2 TB number, precisely ?

[Ensel Sharon]

(6.1-RELEASE - already installed and running with other arrays)

I am installing a new array of 5 500 GB disks.

It's hard to say what the total raw space will be, but it will certainly
be above 2 TB.

However, I want to ensure a ZERO-exposure to any 2 TB limit issues (with
quotas, and disk tools and snapshots, etc.)  So with that in mind, when I
go into my adaptec firmware to create an array, and it asks me to specify
the size of the array, I am going to type in a number _less than_ the max
possible size.

So the question is, do I type in 1999 ? 2000 ? 2047 ? 2048 ?

What number is totally, absolutely safe and will shield me from _all
possible_ BIGDISK related issues ?

I am leaning towards 1999 since that _must be_ safe...but am curious if I
could get away with 2047 or 2048 ...

All comments appreciated.  Thank you!