IBM 86884RX Installation Guide - Page 56
Memory mirroring, Restriction
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Pair Port 1 DIMM slots 7 5 and 10 9 3 and 12 11 6 and 9 13 7 and 8 Pair Port 2 DIMM slots 8 19 and 24 10 17 and 26 12 20 and 23 14 21 and 22 Restriction: When 2 GB DIMMs are used, a maximum of 20 DIMMs can be installed. In such a configuration, the last four pairs of sockets as shown in Table 3-3 must be left empty (that is, sockets 6, 7, 8, 9, and 20, 21, 22, 23). Figure 3-2 shows the DIMM locations and the way the DIMMs are divided into the two memory ports. Port 1 Port 2 Front of server Figure 3-2 DIMM locations on the memory-board assembly Memory mirroring Memory mirroring is supported by the x450 for increased fault tolerance and high levels of availability. 42 IBM ^ xSeries 450 Planning and Installation Guide
![](/manual_guide/products/ibm-86884rx-installation-guide-475b528/56.png)
42
IBM
^
xSeries 450 Planning and Installation Guide
Figure 3-2 shows the DIMM locations and the way the DIMMs are divided into
the two memory ports.
Figure 3-2
DIMM locations on the memory-board assembly
Memory mirroring
Memory mirroring is supported by the x450 for increased fault tolerance and high
levels of availability.
7
5 and 10
8
19 and 24
9
3 and 12
10
17 and 26
11
6 and 9
12
20 and 23
13
7 and 8
14
21 and 22
Restriction:
When 2 GB DIMMs are used, a maximum of 20 DIMMs can be
installed. In such a configuration, the last four pairs of sockets as shown in
Table 3-3 must be left empty (that is, sockets 6, 7, 8, 9, and 20, 21, 22, 23).
Pair
Port 1 DIMM slots
Pair
Port 2 DIMM slots
Port 1
Port 2
Front of server