IBM RS/6000 7043 43P Series Service Manual

Also see for RS/6000 7043 43P Series: Supplemental service manual User guide User guide Setup instructions

Contents

Chapter 5. Location Codes (Model 150 only)This system unit uses physical location codes in conjunction with AIX location codesto provide mapping of the failing field replaceable units. The location codes areproduced by the system unit's firmware and AIX.Physical Location CodesPhysical location codes provide a mapping of logical functions in a platform (orexpansion sites for logical functions, such as connectors or ports) to their specificlocations within the physical structure of the platform.Location Code FormatThe format for the location code is an alphanumeric string of variable length,consisting of a series of location identifiers, separated by the standard dash (-) orslash (/) character. The series is hierarchical; that is, each location identifier in thestring is a physical child of the one preceding it. The - (dash) separator character represents a normal structural relationshipwhere the child is a separate physical package and it plugs into (or is connectedto) the parent. For example, P1-C1 is a CPU card (C1) plugged into a planar(P1), or P1-M1 is a memory card (M1) plugged into a planar (P1). The / (slash) separator character separates the base location code of a functionfrom any extended location information. A group of logical devices can have thesame base location code because they are all on the same physical package,but may require extended location information to describe the connectors theysupport. For example, P2/S1 describes the location of the serial port 1 controllerand its connector (S1), which is located on planar P2 (its base location code),but the / indicates that further devices can be connected to it at the external S1serial connector. The keyboard controller and its connector likewise havelocation code P2/K1, which means they have the same base location code (P2)as serial port 1, but a different external connector. In contrast, the location codeP2-K1 actually points to the device connected to connector K1; that is, thekeyboard. The location code P2/Z1 indicates an integrated SCSI controller whichdrives connector Z1, while location codes of P2-Z1-... point to the actual SCSIbus and devices.Each location identifier consists of one alpha prefix character that identifies a locationtype, and a decimal integer number (typically one or two digits) that identifies aspecific instance of this location type. Certain location types may also supportsecondary sub-locations, which are indicated by appending a period (".") characterand a sub-location instance number.Chapter 5. Location Codes (Model 150 only) 5-1