Memory Mode; Ddr Voltage - Hitachi 220H Bios Manual

Menu items
Patrol Scrub
Data Scrambling
Device Tagging
DIMM Information
Notes:
1 A value in square brackets, [ ], shows the default.
2 If Memory Mode is set Mirroring, half of the installed memory is used for mirroring.
The capacity displayed in Total Memory is half of the installed memory size.
If Memory Mode is set Sparing, for each channel, one rank from the installed DIMMs are used as
spare memory. Depending on whether the installed DIMMs are single-rank or dual-rank, the capacity
displayed in Total Memory is different. The capacity displayed Total Memory is as follows:
- If single-rank DIMMs are installed: 1/2 (2DIMM per channel) or 2/3 (3DIMM per Channel)
of the installed memory size.
- If dual-rank DIMMs are installed: 3/4 (2DIMM per Channel) or 5/6 (3DIMM per Channel)
of the installed memory size.
3 This item is displayed when installing two CPUs in the system unit.

Memory Mode

In order to enable memory redundancy, you can set the memory mirroring
function, the lock step function or the online spare memory function.
If you use memory mirroring, set Mirroring.

If you use memory lock step, set Lock Step.

If you use online spare memory, set Sparing.

When you use memory mirroring, memory lock step, or online spare memory,
you need to understand the restrictions on the configuration of memory boards.
See Hitachi Compute Rack 210H User's Guide or Hitachi Compute Rack 220H
User's Guide.

DDR Voltage

The memory 1600 RDIMM should satisfy the following conditions to perform as
high as 1600 MHz when the memory 1600 RDIMM is mounted in the system unit.
Changed from Auto to 1.5V for the configuration of DDR Voltage.

Xeon processer E5-2670 or E5-2690 should be mounted, and the number of

mounted DIMM should be 1DPC* or 2DPC*.
* DPC (DIMM per channel) is the number of DIMM per channel.
1-34
Selection
Disabled

[Enabled]

Disabled

[Enabled]

[Disabled]

Enabled

-
– 1DPC: Less than or equal to 1 DIMM is mounted in each channel.
– 2DPC: 2 DIMMs are mounted in even one of channels.
– 3DPC: 3 DIMMs are mounted in even one of channels.
System BIOS
Hitachi Compute Rack 210H/220H BIOS Guide
1
Sets the patrol scrubbing which proactively
searches the memory to repair correctable errors.
Sets the memory data scrambling.
Set the device tagging on DIMM.
Displays the DIMM Information submenu.
See DIMM Information
Description
for the details.