Green IT


	Data Centres
	As per EU, data centres are defined as including “all buildings, facilities and rooms which contain data centre equipments(e.g. enterprise servers, server communication equipment, cooling equipment and power equipment) and provide some form of data service”. This encompasses large scale mission critical facilities down to small server rooms located in office buildings.


	Data Centre Equipment
	The equipment associated with a data centre may be divided into two categories: IT equipment Facilities equipment

	IT Equipment encompasses all equipment involved with providing the primary data centre functions and may include:- Servers Storage devices Networking equipment Monitoring and control workstations

	In a data centre, the IT equipment responsible for the greatest energy consumption is the servers (typically servers account for more than 75% of the total IT equipment load). Servers are often split into three classes according to capability (and cost) namely (a) Volume servers (b) Mid-range servers (c) High-end servers

	Facilities Equipment encompasses the mechanical and electrical systems that are required to support the IT equipment and may include: Power distribution equipment Uninterruptible Power Supplies (UPS) Standby generators