The IBM eServer xSeries 455 is the second-generation Enterprise X-Architecture server using the 64-bit IBM XA-64 chipset and the Intel Itanium 2 processor. Unlike the x450, its predecessor, the x455 supports the merging of four server chassis to form a single 16-way image, providing even greater expandability and investment protection. This IBM Redbooks publication is a comprehensive resource on the technical aspects of the server, and is divided into five key subject areas: --Chapter 1, "Technical description", introduces the server and its subsystems and describes the key features and how they work. --Chapter 2, "Positioning", examines the types of applications that would be used on a server such as the x455. --Chapter 3, "Planning", describes the considerations when planning to purchase and planning to install the x455. --Chapter 4, "Installation", covers the process of installing Windows Server 2003, SuSE Linux Enterprise Server, and Red Hat Enterprise Linux AS on the x455. --Chapter 5, "Management", describes how to use the Remote Supervisor Adapter to send alerts to an IBM Director management environment.