Lenovo ThinkServer RD120 Manuel d'utilisateur télécharger pdf (Page 26)

v The server supports online-spare memory. This feature disables the failed

memory from the system configuration and activates an online-spare pair of

DIMMs to replace the failed active DIMM pair. See “Online-spare memory” on

page 14 for more information about online-spare memory and the DIMM

configuration that is required.

v You can enable either online-spare memory or memory mirroring, but not both at

the same time. Online-spare memory provides more memory capacity than

mirroring; mirroring provides better memory protection but less memory capacity

than online-spare memory.

v 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.

To install a DIMM, complete the following steps:

1. Read the safety information that begins on page v and “Installation guidelines”

on page 7.

2. Turn off the server and peripheral devices, and disconnect the power cord and

all external cables.

Attention: In a dc power environment, only trained service personnel other

than Lenovo service technicians are authorized to connect or disconnect power

to the dc power supply. See the documentation that comes with each dc power

supply.

3. Remove the cover.

Attention: To avoid breaking the retaining clips or damaging the DIMM

connectors, open, and close the clips gently.

12 ThinkServer RD120 Types 6444, 6445, 6446, and 6447: Installation Guide

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Lenovo ThinkServer RD120 Manuel d'utilisateur Page 26