I suppose it is some stupid QNAP thing, since my Synololgy NAS units all boot in under 2 minutes. After logging in it takes about a minute to unlock each folder. I'm not sure what goes on during that time - drives are mapped and the root folders are visible immediately though.
I can barely contemplate the amount of data you have in one array.
I have more than that in multiple NAS, but it's mostly for redundancy as I figure a whole unit could die and lose my life's work.
How do you turn your NAS on and off, just with the switch? I would think that your 20 drives could be loud unless out of the way.
My computer working area is also for WFH, and I'm not liking the noise of the newer EXONOS drives. I can move it to the other side of the room (SFP+ supposedly reaches up to 7m) but no way to easily control it. IIRC they had the WOL function for PCs years ago, but that doesn't seem to work. I could try to find the points on the mainboard for the power, but that's not ideal.