Cisco Cisco UCS B440 M2 High-Performance Blade Server Guía Para Resolver Problemas

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Contents

UCS Enhanced Memory Error Management

Page 1

Contents

Introduction

Background on Memory Errors

Classification of Memory Errors .............................................................................................................................. 3

Detected vs. Undetected Errors .................................................................................................................... 3

Hard vs. Soft Errors ....................................................................................................................................... 3

Correctable vs. Uncorrectable Errors ............................................................................................................ 3

Error Correcting Codes

Traditional “SECDED” Error Correcting Codes ........................................................................................................ 4

UCS Error Detection and Correction ............................................................................................................ 4

Trends in Server Memory Systems

Increasing Capacity ................................................................................................................................................ 5

Increasing Bandwidth ............................................................................................................................................. 5

Lower Operating Voltages...................................................................................................................................... 5

Why Error Rates are Increasing

UCS Memory Error Management

Error Reporting Mechanisms .................................................................................................................................. 7

DIMM Blacklisting ....................................................................................................................................... 8

Enhanced Memory Error Management ................................................................................................................... 9

Software Supported .................................................................................................................................... 9

Appendix A:

Additional Memory Error Reporting