Mirror Configuration

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 if a persistent uncorrectable error happens.

Display the memory mirror configuration that was defined by the OS utility.

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

Display the mirroring configuration of memory below 4 GB.

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

Mirror options are 5%, 10%, 15%, 20%, 25%, 30%, 35%, and 40%, which respectively represents 500, 1000, 1500, 2000, 2500, 3000, 3500, and 4000. Any other numbers entered will be rounded to the nearest greater number. For example, if a number is greater than 2000 but less than or equal to 2500 (that is, 2000 < number <=2500), it will be rounded to 2500. Numbers greater than 4000 (> 4000) will be rounded to 4000.

Display the memory mirror configuration that was defined by the UEFI Setup utility.

If a value defined by the UEFI Setup utility conflicts with that defined by the OS, the value defined by the OS will take precedence.

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

This setting is [Disabled] and grayed out when ADDDC Sparing or Partial Mirror is [Enabled].

Partial mirroring reduces the available system memory by percentage of up to 40% per processor. The percentage is set by Partial Mirror Ratio In Basis Points.

This setting is [Disabled] and grayed out when ADDDC Sparing or Full Mirror is [Enabled].

When this option is enabled, all available system memory below the 4 GB address limit will be mirrored; typically 1 GB to 3 GB.