NEC EXP805 User Manual page 86

Chapter 2 Preparations
(2) Memory Sparing Function
By making a rank of DIMM stored in the memory channel under a memory controller of each CPU stand by
as a spare, Memory Sparing Function makes processing continue by making the DIMM standing by perform
the task automatically in case a correctable error occurs in a DIMM under the memory channel in operation.
For the physical memory capacity available from the operating system, refer to the table below.
The
number of
CPU
1
2
Spare Set
Spare Set
The followings are the conditions to use this function.
● Use DIMMS with the same product number for the device.
86
Tips From the operating system, a size smaller than that is really installed is recognized
(it changes depending on the number of DIMM installed and the capacity per one).
The number
8GB 16GB
of memory
(SR) (SR)
8 32GB
12 48GB
16 64GB 128GB
24 96GB 192GB
CPU1 (PROC1)
Memory Controller 1
Spare Set Spare Set
CPU2 (PROC2)
Memory Controller 1
Spare Set Spare Set
Express5800/R120h-2M (2nd-Gen) User's Guide
Types of on-board memory
16GB 32GB
(DR) (DR)
64GB 96GB 192GB
96GB 144GB 288GB
192GB 384GB
288GB 576GB
Memory Controller 2
Spare Set Spare Set
Memory Controller 2
Spare Set Spare Set
1. Installing Internal Optional Devices
64GB 64GB 128GB
(DR) (QR) (OR)
384GB 448GB 768GB
576GB 672GB 1152GB
768GB 896GB 1536GB
1152GB 1344GB 2304GB
Spare Set
Spare Set