Lenovo Flex System x220, Инструкция по установке и обслуживанию

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Reliability, availability, and serviceability features
Three of the most important features in compute node design are reliability, availability, and serviceability
(RAS). These RAS features help to ensure the integrity of the data that is stored in the compute node, the
availability of the compute node when you need it, and the ease with which you can diagnose and correct
problems.
The compute node has the following RAS features:
• Advanced Configuration and Power Interface (ACPI)
• Automatic server restart (ASR)
• Built-in diagnostics using DSA Preboot
• Built-in monitoring for temperature, voltage, and hard disk drives
• Customer support center 24 hours per day, 7 days a week
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• Customer upgrade of flash ROM-resident code and diagnostics
• Customer-upgradeable Unified Extensible Firmware Interface (UEFI) code and diagnostics
• ECC protected DDR3 DIMMs
• ECC protection on the L2 cache
• Error codes and messages
• Integrated management module II (IMM2) that communicates with the Chassis Management Module to
enable remote systems management
• Light path diagnostics
• Memory parity testing
• Microprocessor built-in self-test (BIST) during power-on self-test (POST)
• Microprocessor serial number access
• Processor presence detection
• ROM-resident diagnostics
• System-error logging
• Vital product data (VPD) on memory
• Wake on LAN capability
• Wake on PCI (PME) capability
Major components of the compute node
Use this information to locate the major components on the compute node.
The following illustration shows the major components of the compute node.
1. Service availability varies by country. Response time varies depending on the number and nature of incoming calls.
Chapter 1
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Introduction
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