In managing a server farm, typical concerns at the fore-front of a system administrator's mind include hard-drive space, software reliability, compatibility, system redundancy, and security. What many installations are starting to realize, however, is that as their systems continue to grow they are beginning to outgrow the amount of available electrical power. There are only two solutions to this problem. Either increase the system's capacity to deliver electrical power, or improve the efficiency of the power system in the servers.
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