Posting anon for good reason, I work in enterprise storage.
From an enterprise storage support prospective, I have seen this a number of times.
In most cases the drives/data were recoverable, in a couple it was not.
A lot of contractors seem to be putting together way too big of a system for the room (more profit for them). Also remember you have to "fill" the room quickly, you have sonic issues, you have a shock wave, you have a rapid change in room temp (it cools quickly), in addition to the pressure changes.
It's gotten to the point that I would highly consider a well planned dry pipe water based system with proper drainage vs a gas based system. The only equipment to get soaked will be the equipment in the area of the fire (since water based systems only activate the head under the high intensity heat source), and you don't have to worry as much about the rest of your equipment.