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Chapter 11: Infrastructure Simplificatio... > Phase two: More consolidation - Pg. 180

each server required at least two separate power feeds. With the implementation of the SAN, Customer H has been able not only to reduce the scale of the servers, but also the number via the ability to allocate storage on a large scale. They have also been able to reduce their power and cooling needs via the server consolidation (LPARs and blades), which has been extremely beneficial in opening up floorspace and power in the primary data center. Even with additional growth of the storage environment, they do not see any environmental issues since storage arrays are becoming smaller and their need for power and cooling is decreasing. 11.4.7 Post implementation: Was the environment simplified? With phase one complete, a quick look at the storage environment quickly showed all the areas that had been improved via simplification. First, Customer H only had to manage two switches, versus multiple switches that would have been present in a business-as-usual scenario, or even with a cord-edge design. Secondly, we had 15 servers sharing a single storage device, with server-based storage utilization above 70%, a increase of over 40% from the original scenario. Third, only the equivalent of one Full Time Equivalent (FTE) (two physical FTEs using around 50% of their time) is required to manage the equipment and software. All the attached systems were also easier to manage, since they all had the same storage driver, could have storage allocated dynamically, and they did not experience outages as other systems had. Server-based clustering was also much easier, and added another level of availability to the environment. Finally, with both a new server and a fiber-attached LTO2 tape library, the enterprise-based backup via IBM Tivoli Storage Manager were occurring much quicker, which decreased the backup window for the organization.