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Table 11. Memory-mirroring mode DIMM population sequence
DIMMs
Number of installed
microprocessors DIMM connector
First pair of DIMMs 1 3, 6
Second pair of DIMMs 1 2, 5
Third pair of DIMMs 1 1, 4
Fourth pair of DIMMs 2 14, 11
Fifth pair of DIMMs 2 13, 10
Sixth pair of DIMMs 2 12, 9
Note: DIMM connectors 7, 8, 15, and 16 are not used in memory-mirroring mode.
When you install or remove DIMMs, the server configuration information changes.
When you restart the server, the system displays a message that indicates that the
memory configuration has changed.
Installing a DIMM
To install a DIMM, complete the following steps.
1. Read the safety information that begins on page 3.
2. Turn off the server and peripheral devices, and disconnect the power cord and
all external cables (see “Turning off the server” on page 53).
3. Remove the server cover (see “Removing the cover” on page 159).
1 DIMM air baffle
2 PCI riser-card assembly 1
4. If PCI riser-card assembly 1 contains one or more adapters, remove riser-card
assembly 1 (see “Removing a PCI riser-card assembly” on page 167).
192 ThinkServer RD220 Types 3729, 3779, 3797, and 3798: Hardware Maintenance Manual