Memory Mirroring - IBM System x3620 M3 7376 Installation And User Manual

When you install additional DIMMs, install them in the order shown in Table 6, to
maintain performance.
The following table lists the DIMM connectors on each memory channel.

Memory mirroring

Memory-mirroring mode replicates and stores data on two pairs of DIMMs within
two channels simultaneously. If a failure occurs, the memory controller switches
from the primary pair of memory DIMMs to the backup pair of DIMMs. You must
Table 6. Non-mirroring (normal) mode DIMM installation sequence
Microprocessors installed
1
2
Table 7. Connectors on each memory channel
Memory channel
Channel 0
Channel 1
Channel 2
DIMM connector population sequence
3, 6, 8, 2, 5, 7
3, 11, 6, 14, 8, 16, 2, 10, 5, 13, 7, 15,
DIMM connectors
2, 3, 10, 11
5, 6, 13, 14
7, 8, 15, 16
Chapter 2. Installing optional devices
63