What are the optimal solutions to the problem of ensuring the safe operation of servers in the mode when construction work is underway three meters from them?

Question

Iron

There is a server room in which additional power supply should be extended.
Walls and ceilings will be drilled to pass through walls and to fix structures with sockets to power new powerful 19" server cabinets on the ceiling. As usual
, at the last moment it turned out that it is critical that one of the racks work, which in no case should be turned off, because there will be urgent work with data that cannot be transferred to another day.
At first we decided that if there is a little dust, then just leave the server to work as it is. But then they decided that building dust, of an abrasive nature, could pose a real danger to server hardware, and as a result, to data.
Possible solutions to the problem:

1. Close the desired rack on top and sides with polyethylene. Pros: dust should not get in. Cons: the servers inside will overheat and will not be able to continue working, because. air will not come out.
2. Hang the top with polyethylene, the sides with gauze. Pros: gauze will let air through and retain particles of construction dust. Cons: gauze needs a lot, and it will not hold all the dust.
   
3. Stand on a stepladder near the place where the wall is being drilled and suck all the dust into the vacuum cleaner, preventing it from spreading through the air space of the room. The dust container in the vacuum cleaner should be disposable so that it can be thrown away later. Also, pre-close the top of the server racks. Pros: the dust will not go almost anywhere, only the largest pieces of concrete will fall on the floor, which then must be removed with a damp cloth.
   
4. The same as in point 3, but close this server rack with polyethylene and place a thermometer inside. When the temperature rises to 40 ° C, stop work, remove the polyethylene and wait until it cools down.
   
5. Take the server temporarily to another room. Pros: The safest option in terms of dust protection. Cons: large time and labor costs, as well as a drop in speed, because. network star inside the rack; well, the inconvenience of working in the room where these servers will temporarily stand. Plus, the star switch itself, which cannot be moved, will be prone to dust.
   

At the moment, a decision has been made - option number 4.
The necessity of prevention (cleaning from dust) of servers in this rack immediately after these works is considered.
What other better solutions are there to the problem of ensuring the safe operation of servers in the mode when construction work is underway three meters from them?

Answer 1

Close the cabinet completely with polyethylene, bring two corrugated hoses (for example, from aluminum foil) of large cross section from the clean room (used, for example, for household hoods). One (supply) to the bottom of the cabinet, the other (exhaust) - to the top of the cabinet. If the cross section is insufficient, buy a household built-in fan for 100 rubles and fix it on the outer end of one of the corrugations - better than the supply one, so that excess pressure is created in the cabinet, and not reduced (dust will fly less).

Answer 2

Option 4. but with amendments:
Put a damp cloth on top of the polyethylene on all racks - it will collect that dust. which will not fall into the vacuum cleaner (there will be a lot of it). Be sure to press the polyethylene and fabric to the floor. Prevention may or may not be necessary.
Place an ordinary household outdoor air conditioner under the polyethylene in cooling mode, and bring its exhaust out of the room with a corrugation.
Well, you yourself are in the server room. Guard the racks.