Fire protection / Alarms
There must be controlled access to the data centre via security cards, biometrics or other auditable methods. Punch codes should be avoided, but if used, the codes should be changed frequently (monthly and/or whenever there is related staff turnover. Consider using security cameras within the data centre, current installation and cost make this a simple inexpensive solution. Fire suppression systems will vary depending on local availability, and whether water or gas based, have related advantages and disadvantages. Water is the cheapest and simplest to install and maintain, but causes the most damage to computer equipment and increases the likelihood of electrical shock. For gas, Halon, a chemical suppressant, popular in the sands, was banned inmost countries in the late sis an ozone depleting substance and a physical hazard if staff are exposed for extended periods (10 minutes or longer. The most common waterless agent currently used is a gas called FM. It is safe for people and it's totally benign to electronic equipment. Also, nothing can get inside and around components like a gas. The downside to FM is cost. It's more expensive than a sprinkler system and a little more expensive than Halon. Also, it doesn't have a totally clean environmental profile. While FM does not deplete the ozone, it is a greenhouse gas producer that contributes to global warming. A third system to consider for smaller data centres is a manually operated canister unit that staff can utilize in the event of an emergency. For these, a dry chemical or CO system is recommended. Regardless of the system, data centre managers need to have a plan in place, and should test discharge sequences, batteries, pull testing and the rest of the system. Even more critical that afire suppression system, are data centre alarms that monitor temperature, humidity, power, and smoke. All four are strongly recommended and should have the ability to send an alert via phone, email and pager, and provide online access to real-time reports that detail the current status of the AC system, UPS, and other items. Alerts should be sent to multiple recipients to ensure that all critical systems are covered 24/7.
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