Adrian Leal


ITS 370

Chapter 9


1.       Assume that your organization is planning to have an automated server room that functions without human assistance. Such room is often called a lights-out server room. Describe the fire control system(s) 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 no conducting.


2.       Assume you have converted and 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 b. Access control c. Fire detection d. Fire suppression e. Heating, ventilating, and air conditioning f. Power quality and distribution

a.       Due to the construction of the walls and doors of the facility, the security of information assets can sometimes be compromised. In high security areas such as a server room, the firewalls and doors with either mechanical or electromechanical locks should be used

b.      For physical security, a secure facility is an ideal location that has been engineered with a number of controls designed to minimize the risk of attacks from physical threats. An organization should consider using as many security controls as possible in order to secure a server room.

c.       Either manual or automatic fire detection systems need to be installed. Manual fire detection systems include human responses, such as calling the fire department, as well as manually activated alarms, such as sprinklers and gaseous systems

d.      There are a variety of fire suppression systems commonly used in many organizations including portable, manual, and automatic apparatus. One or more fire suppression systems should be prepared in case of emergency

e.      Since the operation of the heating, ventilation, and air conditioning (HVAC) system can have dramatic impact on information systems operations and protection, four areas (temperature, filtration, humidity, and static electricity) within HVAC system should properly managed


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 not have to be online at all times, it stores valuable data that could be corrupted if the power system were suddenly interrupted. Which UPS features are most important to such a system? Which type of UPS do you recommend for it?

The four basic configurations of UPS are standby, standby ferroresonant, line-interactive, and true online. Important considerations for UPS systems include switch time, the amount of electricity the UPS supplies, and costs. Switch time refers to the amount of time it takes for the UPS to activate a transfer switch. The wattage needed to keep the equipment running for a certain period of time should be precisely calculated, which helps in the selection of a proper UPS that meets the organizationís power supply needs. Also, the more sophisticated the UPS becomes, the more costly it is. The best way to select a UPS is to identify the smallest one necessary to provide the needed support. In this scenario, a standby ferroresonant UPS would be the best selection.


5.       Define the required wattage for a UPS to be used with the following systems: a. Monitor: 2 amps; CPU: 3 amps; printer: 3 amps b. Monitor: 3 amps; CPU: 4 amps; printer: 3 amps c. Monitor: 3 amps; CPU: 4 amps; printer: 4 amps.

The required wattage are:

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


6.       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.

Uninterruptible power supply (UPS) systems combine a surge protector and a backup battery. Many vents draw between 200 and 400 watts of power. But to be safe, the power source should provide more than the specified wattage. If the necessary power isnít there, the device canít perform its vital job. Vent owners need to know the operating specifications for their particular unit when shopping around for backup power. A unit rated at 200 VA hours will support 800 watts 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