Penguin Computing Relion 1900e, Technical Manual, Page: 38 / 174

23 Revision 1.3
Relion 1900e/2900e Manual
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

CMD/ADDR Retry
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 Supported Memory
Table 4. DDR4 RDIMM & LRDIMM Support
Type
Ranks
Per
DIMM
and Data
Width
DIMM Capacity (GB)
Max Speed (MT/s); Voltage (V);
Slot per Channel (SPC) and
DIMM per Channel (DPC)
3 Slots per Channel
1 DPC 2 DPC 3 DPC
4 Gb 8 Gb 1.2V 1.2V 1.2V
RDIMM SRx4 8GB 16GB 2400 2133 1600
RDIMM SRx8 4GB 8GB 2400 2133 1600
RDIMM DRx8 8GB 16GB 2400 2133 1600
RDIMM DRx4 16GB 32GB 2400 2133 1600
LRDIMM QRx4 32GB 64GB 2400 2400 1866
LRDIMM
3DS
8Rx4 64GB 128GB 2400 2400 1866