Chapter 1. The System x3550 M2 serverThis Installation and User's Guide contains information and instructions for settingup your IBM System x3550 M2 Type 4198 or 7946 server, instructions for installingsome optional devices, and instructions for cabling, and configuring the server. Forremoving and installing optional devices, diagnostics and troubleshootinginformation, see the Problem Determination and Service Guide on the IBM Systemx Documentation CD, which comes with the server.The IBM ® System x3550 M2 Type 4198 or 7946 server is a 1-U-high 1 rack modelserver for high-volume network transaction processing. This high-performance,dual-core or quad-core server is ideally suited for networking environments thatrequire superior microprocessor performance, input/output (I/O) flexibility, and highmanageability.Performance, ease of use, reliability, and expansion capabilities were keyconsiderations in the design of the server. These design features make it possiblefor you to customize the system hardware to meet your needs today and provideflexible expansion capabilities for the future.The server comes with a limited warranty. For information about the terms of thewarranty and getting service and assistance, see the Warranty Informationdocument that comes with the server.The server contains IBM X-Architecture ® technologies, which help increaseperformance and reliability. For more information, see “What your server offers” onpage 8 and “Reliability, availability, and serviceability” on page 11.You can obtain up-to-date information about the server and other IBM serverproducts at http://www.ibm.com/systems/x/. At http://www.ibm.com/support/mysupport/, you can create a personalized support page by identifying IBMproducts that are of interest to you. From this personalized page, you can subscribeto weekly e-mail notifications about new technical documents, search for informationand downloads, and access various administrative services.If you participate in the IBM client reference program, you can share informationabout your use of technology, best practices, and innovative solutions; build aprofessional network; and gain visibility for your business. For more informationabout the IBM client reference program, see http://www.ibm.com/ibm/clientreference/.The hot-swap server models support six 2.5-inch hot-swap Serial Attached SCSI(SAS) hard disk drives. The illustrations in this document might differ slightly fromyour model.1. Racks are marked in vertical increments of 1.75 inches each. Each increment is referred to as a unit, or a “U”. A 1-U-high deviceis approximately 1.75 inches tall.© Copyright IBM Corp. 2010 1