Bailey Johnson

ITS 370

CH9

 

1.      Assume that your organization is planning to have an automated server room that functions without human assistance. Such a room is often called a lights-out server room describe the fire control system you would install in that room.

An automatic fire detection system would certainly be the best choice for a lights-out server room in the data center, where no human beings are physically present. As for the type of fire detection system, I would probably opt for a very sophisticated system like the air-aspirating detector system, since the server room is certainly a high-sensitive area where critical devices are stored. This system works by taking in air, filtering it, and moving it through a chamber containing a laser beam. If the laser beam is diverted or refracted by smoke particles, the system is activated. Another key element I would consider is the type of fire suppressor to adopt. In this kind of decision, very important is to consider the type of fire that has to be combated. Class C includes fires with energized electrical equipment or appliances, that is, fires that are extinguished with agents that must be nonconducting. Since this is the type of fire that would interest a server room, the attention must be focused on a gaseous emission system, and in particular on a system that uses a clean chemical agent (like it was Halon before it got prohibited in commercial and residential locations). Clean agents are those that don't leave any residue when dry, and don't interfere with the operation of electrical or electronic equipment. Alternative clean agents (even if they are reported to be less effective than Halon) are FM-200, Inergen, Carbon Dioxide, and FE-13 (one of the newest and safest clean agent variations of the most commonly used clean agents).

2.      Assume you have converted an area of general office space into a server room. Describe the factors you would consider for each of the following components:

A) Walls and doors: With a general office space the construction of the walls and doors of the facility can sometimes be compromised so in high security areas either mechanical or electromechanical locks should be used.

B)Access Control: For physical security a number of methods can be deployed including walls, fencing, guards, dogs, id cards and badges, locks/keys, mantraps, electronic monitoring, alarm systems, and interior walls and doors.

C) Fire Detection: Either manual or automatic fire detection systems need to be installed.

D) Fire Suppression: There are portable, manual and automatic apparatuses available. Several systems should be prepared in case of emergency.

E)Heating, ventilating and air conditioning: Four areas, temperature, filtration, humidity and static electricity, withing the HVAC system should be properly manage.

F)Power quality and distribution: The most critical factor for power systems used by information-processing equipment is that the power infrastructure is properly installed and correctly grounded.

3.      Assume you have been asked to review the power needs of a stand-alone computer system that processes important but noncritical data. Although the system does have to be online at all times it store valuable data that could be corrupted if power system were suddenly interrupted. Which UPS features are most important to such a system? Which type of UPS do you recommend for it?

Important considerations for UPS systems include switch time, the amount of electricity the UPS supplies and costs. In this scenario a standby ferroresonant UPS would be the best selection.

4.      Define the required wattage for a UPS to be used with the following systems:

Assuming that the systems are operating in the United States at a standard voltage of 120 volts at 60 Hz:

a.(2 * 120) + (3 * 120) + (3 * 120) = 960 watts

b.(3 * 120) + (4 * 120) + (3 * 120) = 1,200 watts

c.(3 * 120) + (4 * 120) + (4 * 120) = 1,320 watts

5.      Search the Web for a UPS that provides the wattage necessary to run the systems described in Exercise 5 for at least 15 minutes during a power outage.

The products that students may find can be evaluated by the common practice of vendors rating the unit in VA hours. A unit rated at 200 VA hours will support 800watts for 15 minutes (a quarter-hour). Using this process, the minimum VA hour rating for UPS units that meet the requirement are:

a. 240 VA hours

b. 300 VA hours

c. 330 VA hours