Intel SE8500HW4 4.4Data Correction and Scrubbing, 4.5Memory Board Components

Intel® Server Board Set SE8500HW4 Intel® Server Board Set SE8500HW4 Memory Board

4.4Data Correction and Scrubbing

The XMB employs a Single Device Data Correction (x8 SDDC) algorithm for the memory subsystem that will recover from a component failure during read and write transactions. This corrects and logs a correctable memory error, and logs uncorrectable memory errors.

A patrol scrub can be turned on in the system BIOS that scrubs roughly 64GB of memory behind each XMB every day. The patrol scrub confirms the data for one cache line every 16k core cycles and then increments the address one cache line. During patrol scrub, an erroneous read will be logged and re-read. If the re-read is correctable, it is corrected (scrubbed) in memory. A conflicting read or write request pending issue will be held until the scrub is finished.

4.5Memory Board Components

			DIMM_1B
			DIMM_1A
Remote							Temperature
Temperature							Sensor
Sensor			DIMM_2B				Controller
			DIMM_2A
	Channel A				Channel B
		E8500 eXtended Memory
			Bridge
			IMI	I2C
						FRU

Main Board Connector

Figure 6. Memory Board Block Diagram

Revision 1.0	23
	Intel order number D22893-001