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Mirror Configuration

Table 1. Mirror Configuration
ItemOptionsDescription
Mirror Fail-Over

  • Disabled

  • Enabled (Default)

Enable or disable mirror fail-over.

  • When [Enabled] is selected, a persistent memory uncorrectable error will trigger mirror fail-over.

  • When [Disabled] is selected, mirror fail-over is skipped even a persistent uncorrectable error happens.

Note

  • This item only takes effect when Full Mirror or Partial Mirror is enabled.

  • This item is not supported for High Bandwidth Memory (HBM).

Configuration Made From OS

N/A

Display the memory mirror configuration state that was defined from the OS utility.

When a definition is found, you can use Delete Configuration Made From OS to clear it.

Mirror Below 4GB

None

Display the mirroring configuration of memory below 4 GB.

Note
The option may be [TRUE] or [FALSE] after the OS has configured memory mirroring.
Partial Mirror Ratio In Basis Points

None

Display the mirroring ratio for the memory above 4GB in basis points.

The valid range is 1 – 5000, meaning 0.01% to 50%. For example, to mirror 12.75% of memory, input the value 1275.

Note
The option may be a value within the range of 1 – 5000 after the OS has configured memory mirroring.
Configuration Made From UEFI

N/A

Display the memory mirror configuration state that was defined from the UEFI system utility.

In case of a conflict with the configuration values from OS, the values from OS will take precedence.

Full Mirror

  • Disabled (Default)

  • Enabled

Full mirroring reduces the available system memory by half of the total installed memory.

Note

DDR5 9x4 value DIMMs do not support full mirroring.

Partial Mirror

  • Disabled (Default)

  • Enabled

Partial mirroring reduces the available system memory by percentage of up to 50% per processor. The percentage is set by Partial Mirror Ratio In Basis Points.

Note

  • Partial memory mirroring is a sub-function of memory mirroring. It requires to follow the memory population for memory mirroring.

  • DDR5 9x4 value DIMMs do not support partial mirroring.