Mirrored memory configuration

Mirroring provides protection against uncorrected memory errors that would otherwise result in server downtime. Mirroring is performed at the channel level to one memory channel pair that can be either:

• Channel 1 data being mirrored in channel 2
• Channel 3 data being mirrored in channel 4

If an uncorrectable error is detected in the active memory channel, data is retrieved from the mirror channel. This channel becomes the new active channel, and the system disables the channel with the failed DIMM.