AE with 3 external drives: Partition privacy question

I have an AE at work today with two 1Tb drives on it, shared via "disk password". I want to add a third drive, partitioned into 3 partitions (management, internal, and general). I've already partitioned it from my MBPro (Mac OS Extended-Journaled) with GUID Partition Table (I'm pretty sure that's what I needed to do).
When I connect it to the AE, I need to restrict access to the management partition to managers, internal partition to a list of specific users, and then make the remaining partition "open" to anybody who can see the AE (disk password, like the other two whole drives).
I'd do the experimentation myself, but I can't bring it down to play and experiment right now. I can make any changes needed as long as I schedule the outage.
It it as simple as
1) changing the AE setting for Disks --> File Sharing setting for "Secure shared disks" from "Use Disk Password" to "With accounts",
2) Adding all users in my network to the accounts list
3) Add them appropriately to the two existing drives, and the third 3-partition drive?
TIA for any insight/tips,
Steve

<BUMP>

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