IBM 71453RU manual High-performance memory-card installation sequence

Table 8. High-performance memory-card installation sequence

DIMM pair installation	Memory-card connector
order	number	DIMM connector numbers
First	1	1 and 8
Second	7	1 and 8
Third	3	1 and 8
Fourth	5	1 and 8
Fifth	2	1 and 8
Sixth	8	1 and 8
Seventh	4	1 and 8
Eighth	6	1 and 8
Ninth	1	3 and 6
Tenth	7	3 and 6
Eleventh	3	3 and 6
Twelfth	5	3 and 6
Thirteenth	2	3 and 6
Fourteenth	8	3 and 6
Fifteenth	4	3 and 6
Sixteenth	6	3 and 6
Seventeenth	1	2 and 7
Eighteenth	7	2 and 7
Nineteenth	3	2 and 7
Twentieth	5	2 and 7
Twenty-first	2	2 and 7
Twenty-second	8	2 and 7
Twenty-third	4	2 and 7
Twenty-fourth	6	2 and 7
Twenty-fifth	1	4 and 5
Twenty-sixth	7	4 and 5
Twenty-seventh	3	4 and 5
Twenty-eighth	5	4 and 5
Twenty-ninth	2	4 and 5
Thirtieth	8	4 and 5
Thirty-first	4	4 and 5
Thirty-second	6	4 and 5

Memory mirroring replicates and stores data on two pairs of DIMMs simultaneously. If a memory failure occurs, the memory controller switches from the primary set of DIMMs to the backup set of DIMMs.

When you use memory mirroring, consider the following information:

–To enable memory mirroring through the Setup utility, select System Settings > Memory. For more information, see “Using the Setup utility” on page 96.

–Memory mirroring reduces the available memory by half. For example, if the server has 64 GB of installed memory, only 32 GB of addressable memory is

Chapter 2. Installing optional devices 67