Supported Memory; Table 4. Ddr4 Rdimm & Lrdimm Support - Penguin Computing Relion 1900e Technical Manual

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DDR4 Command/Address Parity Check and Retry: DDR4 technology based CMD/ADDR parity check and

retry with following attributes:

CMD/ADDR Parity error address logging

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CMD/ADDR Retry

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Intra-Socket Memory Mirroring: Memory Mirroring is a method of keeping a duplicate (secondary or

mirrored) copy of the contents of memory as a redundant backup for use if the primary memory fails. The

mirrored copy of the memory is stored in memory of the same processor socket. Dynamic (without reboot)

failover to the mirrored DIMMs is transparent to the OS and applications. Note that with Memory Mirroring

enabled, only half of the memory capacity of both memory channels is available.

Memory Demand and Patrol Scrubbing: Demand scrubbing is the ability to write corrected data back to the

memory once a correctable error is detected on a read transaction. Patrol scrubbing proactively searches the

system memory, repairing correctable errors. It prevents accumulation of single-bit errors.

HA and IMC Corrupt Data Containment: Corrupt Data Containment is a process of signaling memory patrol

scrub uncorrected data errors synchronous to the transaction, which enhances the containment of the fault

and improving the reliability of the system.

Rank Level / Multi Rank Level Memory Sparing: Dynamic fail-over of failing ranks to spare ranks behind the

same memory controller. With Multi Rank, up to four ranks out of a maximum of eight ranks can be assigned

as spare ranks. Memory mirroring is not supported when memory sparing is enabled.

Failed DIMM Isolation: The ability to identify a specific failing DIMM, thereby enabling the user to replace

only the failed DIMM(s). In case of uncorrected error and lockstep mode, only DIMM-pair level isolation

granularity is supported.

4.4