Specifications

Chapter 4. Continuous availability and manageability 169
4.3 Serviceability
IBM Power Systems design considers both IBM and client needs. The IBM Serviceability
Team has enhanced the base service capabilities and continues to implement a strategy that
incorporates best-of-breed service characteristics from diverse IBM systems offerings.
Serviceability includes system installation, system upgrades and downgrades (MES), and
system maintenance and repair.
The goal of the IBM Serviceability Team is to design and provide the most efficient system
service environment that includes:
򐂰 Easy access to service components, design for Customer Set Up (CSU), Customer
Installed Features (CIF), and Customer Replaceable Units (CRU)
򐂰 On demand service education
򐂰 Error detection and fault isolation (ED/FI)
򐂰 First-failure data capture (FFDC)
򐂰 An automated guided repair strategy that uses common service interfaces for a converged
service approach across multiple IBM server platforms
By delivering on these goals, IBM Power Systems servers enable faster and more accurate
repair and reduce the possibility of human error.
Client control of the service environment extends to firmware maintenance on all of the
POWER processor-based systems. This strategy contributes to higher systems availability
with reduced maintenance costs.
This section provides an overview of the progressive steps of error detection, analysis,
reporting, notification, and repairing that are found in all POWER processor-based systems.
4.3.1 Detecting
The first and most crucial component of a solid serviceability strategy is the ability to
accurately and effectively detect errors when they occur. Although not all errors are a
guaranteed threat to system availability, those that go undetected can cause problems
because the system does not have the opportunity to evaluate and act if necessary. POWER
processor-based systems employ System z® server-inspired error detection mechanisms
that extend from processor cores and memory to power supplies and hard drives.
Service processor
The service processor is a microprocessor that is powered separately from the main
instruction processing complex. The service processor provides the capabilities for:
򐂰 POWER Hypervisor (system firmware) and Hardware Management Console
connection surveillance
򐂰 Several remote power control options
򐂰 Reset and boot features
򐂰 Environmental monitoring
The service processor monitors the server’s built-in temperature sensors, sending
instructions to the system fans to increase rotational speed when the ambient temperature
is above the normal operating range. Using an architected operating system interface, the
service processor notifies the operating system of potential environmentally related