Chapter 2. Diagnostics OverviewModel 270 systems use an integrated set of software diagnostic procedures to facilitateisolation of failing components and system maintenance. This book, along with theRS/6000 and Eserver pSeries Diagnostics Information for Multiple Bus Systems, arethe basis of the diagnostic procedures for the system. In particular, the followingsections in this book are important for the trained service representative to understandand use when isolating a failure on the system:v Chapter 4, “Checkpoints”, on page 71v Chapter 5, “Error Code to FRU Index”, on page 93v Chapter 6, “Loading the System Diagnostics”, on page 147v Chapter 10, “Parts Information”, on page 271The manufacturer recommends that systems configured with 4 GB of memory orgreater have access to a 4 mm or 8 mm tape drive for submission of system dumpinformation if required. This function can be accomplished through locally-attached ornetwork-attached devices, as appropriate.Maintenance Analysis Procedures (MAPs)Maintenance analysis procedures (MAPs) guide the trained service person through thesystem. These MAPs are the entry point for all isolation and error-recovery procedures.The MAPs are consistent with existing procedures and methods. The system uses a setof integrated procedures, mentioned earlier, to which the MAPS are the primary entrypoint.The MAPS are as follows:v Entry MAPv Quick Entry MAPv Problem Determination MAPv Power MAPv Minimum Configuration MAPThe Entry Map is the starting point for problem determination. The purpose of this MAPis to quickly point to the appropriate MAP or service reference information either in thisbook, or in the common book set, which includes the RS/6000 and Eserver pSeriesDiagnostics Information for Multiple Bus Systems and thePCI Adapter PlacementReference.The Quick Entry MAP is a subset of the Entry MAP and helps to save time for sometypes of problems.The Problem Determination MAP provides a structured analysis method to get an errorcode if one is not provided by the customer, or if diagnostics cannot be loaded.21
