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https://support.hp.com/vn-en/document/c01141112
Online Spare Memory is a higher level of memory protection that complements ECC (Error Checking and Correcting) memory. Since Online Spare Memory is a user selectable option, customers can choose to use all of the memory as primary memory for applications that require maximum memory configuration.
https://support.hpe.com/hpsc/doc/public/display?docId=emr_na-c00218059
Online Spare Memory is a higher level of memory protection that complements Advanced ECC support. Online Spare Memory is a user selectable option. Users can choose to disable Online Spare and make all installed memory available to the operating system and applications, or they can
https://support.hpe.com/hpsc/doc/public/display?docId=emr_na-c00384957
To configure online spare memory: Install the required DIMMs. Access RBSU by pressing the F9 key during powerup when the prompt is displayed in the lower right corner of the screen. Select System Options. Select Advanced Memory Protection. Select Online Spare with Advanced ECC Support. Press the Enter key.
https://support.hpe.com/hpsc/doc/public/display?docId=emr_na-c00409930
Online Spare Memory Configuration. With online spare memory, primary server memory can be configured for up to 6 GB of ECC DDR2 SDRAM and configure an additional 6 GB of online spare memory. In this configuration, all six DIMM slots are populated with up to 2-GB Registered ECC …
https://support.hpe.com/hpsc/swd/public/detail?swItemId=MTX_7de9ce267dc34382ac665f5212
Addressed an issue where the system may fail during a rank spare failover event in certain memory configurations when the ROM Based Setup Utility (RBSU) setting, System Options->Advanced Memory Protection, is set to "Online Spare with Advanced ECC Support".
https://h20195.www2.hpe.com/v2/GetPDF.aspx/4AA4-3490ENW.pdf
Online spare with Advanced ECC support Overview Online sparing provides protection against persistent DRAM fail ure. It tracks excessive numbers of correctable errors and copies the contents of an unhealthy rank to an available spare rank in advance of multi -bit or persistent single- bit failures that may result in future uncorrectable faults.
https://support.hpe.com/hpsc/swd/public/detail?swItemId=MTX_1c8c6ecc0ce8422aacda317207
Addressed an issue where a system configured with Intel Xeon E5-2690 v2, E5-2680 v2, E5-2670 v2, and E5-2660 v2 processors and Advanced Memory Protection configured to Online Spare Mode may experience incorrect behavior when multiple Online Spare switchovers occur on the same processor.
https://techlibrary.hpe.com/docs/iss/DL380pGen8/setup_install/advanced/Content/138605.htm
Advanced ECC can correct both single-bit memory errors and 4-bit memory errors if all failed bits are on the same DRAM device on the DIMM. Advanced ECC provides additional protection over Standard ECC because it is possible to correct certain memory errors that would otherwise be …
http://service1.pcconnection.com/PDF/AdvMemoryProtection.pdf
Single-bit and multi-bit errors The memory bus is a circuit that consists of two parts: the data bus and the address bus. The data bus is a set of traces that carry the actual data to and from SDRAM.
https://www.teimouri.net/review-hpe-advanced-memory-protection-technologies/
Online Spare memory mode is a higher level of memory protection that complements Standard Memory mode with Advanced ECC. With Online Spare mode, a DIMM with a rank of memory at least as large as the other ranks in the system, or memory board, is designated as the Online Spare rank.2 If one of the other DIMMs exceeds a threshold rate of correctable memory errors, the affected rank of …
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