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Cisco UCS B230 M2 Blade Server
Troubleshooting Guide
Cisco Cisco UCS B230 M2 Blade Server Troubleshooting Guide
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Contents
UCS Enhanced Memory Error Management
Page 1
Contents
Introduction
2
Background on Memory Errors
3
Classification of Memory Errors .............................................................................................................................. 3
Detected vs. Undetected Errors .................................................................................................................... 3
Hard vs. Soft Errors ....................................................................................................................................... 3
Correctable vs. Uncorrectable Errors ............................................................................................................ 3
Error Correcting Codes
4
Traditional “SECDED” Error Correcting Codes ........................................................................................................ 4
UCS Error Detection and Correction ............................................................................................................ 4
Trends in Server Memory Systems
5
Increasing Capacity ................................................................................................................................................ 5
Increasing Bandwidth ............................................................................................................................................. 5
Lower Operating Voltages...................................................................................................................................... 5
Why Error Rates are Increasing
6
UCS Memory Error Management
7
Error Reporting Mechanisms .................................................................................................................................. 7
DIMM Blacklisting ....................................................................................................................................... 8
Enhanced Memory Error Management ................................................................................................................... 9
Software Supported .................................................................................................................................... 9
Conclusion
10
Appendix A:
Additional Memory Error Reporting
11
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