User`s manual

22 23MAXDATA PLATINUM 7200 IR M6Platform Description

Available Memory Conﬁgurations

Four memory configurations are available in the BIOS Setup utility.

• Maximum Performance: Maximum Performance is the default configuration in BIOS setup.

With this configuration, the BIOS first attempts to configure the Memory Boards as four-

way interleaved. If four-way interleaving cannot be accomplished, it will attempt to two-way

interleave. It will then use one-way interleaving if any remaining memory cannot be four-

way or two-way interleaved. This interleaving process configures the memory for maximum

performance. This configuration cannot be used if you want hot-add or hot-replace memory.

• Maximum Compatibility: Maximum Compatibility provides the most flexibility with DIMMs

and Memory Boards. This option allows memory to be hot-added and hot-replaced. Server

performance will be reduced due to one-way interleaving.

• Memory Mirroring: The Memory Mirroring feature provides redundancy. It uses either two

or four Memory Boards, paired as sets of two. Memory Boards in slots A and B form one set.

Memory Boards in slots C and D form the second set. One board within a set of Memory

Boards duplicates the second board in the set. Each Memory Board in a set must have the

same amount of memory installed.

When a hardware or DIMM error is detected on a primary Memory Board, the second board

becomes the primary board and remains primary until the failing board or DIMM is replaced.

Memory Mirroring uses board-level redundancy, allowing for hot-replacement. The hot-add is

supported by adding two addition mirrored Memory Boards.

The BIOS turns on the mirror LED on each Memory Board when the system is configured for

mirroring.

• Memory RAID: If the server contains four Memory Boards with equal memory capacity, the

system can be configured for Memory RAID. Data is written to three of the Memory Boards

while one is reserved for redundant parity information. This reduces the total overall available

memory by one-fourth. The RAID LED on the Memory Board will indicate that the Memory

Board is in a RAID configuration.

When a DIMM rank or board fails, the system will continue to operate with the remaining

three boards by recreating the data from the failed board. The system loses its redundancy at

this point, and will remain in this non-redundant state until the failing board and/or memory is

replaced.

This configuration allows for hot-replacement of failing Memory Boards and hot-add and hot-

replacement of memory DIMMs.