HP ProLiant ML10 HP Advanced Memory Error Detection Technology
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- HP ProLiant ML10 | HP Advanced Memory Error Detection Technology - Page 1
4 Why memory errors are increasing...4 Server memory capacity is increasing 4 DRAM technology is changing...5 HP Advanced Memory Error Detection Technology 5 Enhancements...5 Advantages ...6 HP ProLiant servers supported ...6 Conclusion...6 For more information...8 - HP ProLiant ML10 | HP Advanced Memory Error Detection Technology - Page 2
to ensure data reliability and protection. In 1999, we introduced the Pre-Failure Alert notification system to monitor and predict potential problems with critical components such as system memory modules (DIMMs). The notification system sends an alert to a system administrator when a DIMM exceeds - HP ProLiant ML10 | HP Advanced Memory Error Detection Technology - Page 3
Each DDR3 DRAM chip contains billions of memory cells ordered in eight banks (arrays) of rows and columns. Using a 2 Gb x4 DRAM chip as an example, each bank contains 210 (1,024) rows and 216 (65,536) columns, totaling more than 256 million cells per bank and more than 2 billion cells per chip. Each - HP ProLiant ML10 | HP Advanced Memory Error Detection Technology - Page 4
chip fails, but the DIMM remains in operation, DDDC will continue to work even if a second chip has an error or fails. Intel Xeon systems support DDDC in lockstep memory mode. In lockstep mode, two channels operate as a single channel so that each write and read operation moves a cache line two - HP ProLiant ML10 | HP Advanced Memory Error Detection Technology - Page 5
Integrated Management Log (IML) as shown in Figures 3A and 3B. The administrator can access the IML using a supported browser, even when the server is off. The administrator‟s ability to view the event log when the server is off can be beneficial when troubleshooting remote host server problems. 5 - HP ProLiant ML10 | HP Advanced Memory Error Detection Technology - Page 6
then better plan downtime to replace degraded DIMMs, avoiding the unplanned downtime associated with a non-recoverable memory error. HP ProLiant servers supported HP Advanced Memory Error Detection Technology is introduced in the System ROM upgrade (May 2011 or later) for certain Intel Xeon-based - HP ProLiant ML10 | HP Advanced Memory Error Detection Technology - Page 7
condition. As a result, administrators have unnecessarily or prematurely replaced good DIMMs at a cost of unnecessary downtime and repairs. In the ProLiant System ROM upgrade (version May 2011 or later), we have enhanced memory error protection with HP Advanced Memory Error Detection Technology. - HP ProLiant ML10 | HP Advanced Memory Error Detection Technology - Page 8
.www2.hp.com/bc/docs/support/SupportMan ual/c00256987/c00256987.pdf http://h20000.www2.hp.com/bc/docs/support/SupportMan ual/c02126499/c02126499.pdf Send for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be
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HP Advanced Memory Error Detection
Technology
Technology brief
Introduction
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2
SDRAM technology
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2
Memory errors
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3
Traditional memory error classifications
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4
Correctable and uncorrectable errors
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4
Why memory errors are increasing
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4
Server memory capacity is increasing
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4
DRAM technology is changing
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5
HP Advanced Memory Error Detection Technology
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5
Enhancements
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5
Advantages
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6
HP ProLiant servers supported
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6
Conclusion
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6
For more information
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8