IBM S822LC, Технический обзор и введение

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Chapter 2. Management, Reliability, Availability, and Serviceability
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2.2.2 Intelligent Platform Management Interface
The IPMI is an open standard for monitoring, logging, recovery, inventory, and control of
hardware that is implemented independent of the main CPU, BIOS, and OS. The Power
S822LC server provides one 10Mb/100Mb baseT IPMI port.
The
ipmitool
is a utility for managing and configuring devices that support IPMI. It provides a
simple command-line interface (CLI) to the service processor. You can install the ipmitool
from the Linux distribution packages in your workstation or another server (preferably on the
same network as the installed server). For example, in Ubuntu, run the following command:
$ sudo apt-get install ipmitool
To connect to your system with IPMI, you must know the IP address of the server and have a
valid password. To power on the server with ipmitool, complete the following steps:
1. Open a terminal program.
2. Power on your server by running the following command:
ipmitool -I lanplus -H fsp_ip_address -P ipmi_password power on
3. Activate your IPMI console by running the following command:
ipmitool -I lanplus -H fsp_ip_address -P ipmi_password sol activate
2.3 Reliability, availability, and serviceability
This chapter provides information about IBM Power Systems reliability, availability, and
serviceability (RAS) design and features.
The elements of RAS can be described as follows:
Reliability Indicates how infrequently a defect or fault in a server occurs
Availability Indicates how infrequently the functioning of a system or application is
impacted by a fault or defect
Serviceability Indicates how well faults and their effects are communicated to system
managers and how efficiently and nondisruptively the faults are
repaired
2.3.1 Introduction
The IBM Power Systems S822LC servers are bringing POWER8 processor and memory
RAS functions into a highly competitive cloud data center with open source Linux technology
as an operating system and virtualization.
The Open Power Abstraction Layer (OPAL) firmware provides a hypervisor and operating
system independent layer that uses the robust error-detection and self-healing functions built
into the POWER8 processor and memory buffer modules.
The processor address-paths and data-paths are protected with parity or error-correcting
codes (ECCs); the control logic, state machines, and computational units have sophisticated
error detection. The processor core soft errors or intermittent errors are recovered with
processor instruction retry. Unrecoverable errors are reported as machine check (MC) errors.
Errors that affect the integrity of data lead to system checkstop.