Lenovo Flex System x220, Инструкция по установке и обслуживанию

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Table 13. Rank-sparing mode DIMM installation sequence (continued)
DIMM connectors
Installation
order
With one microprocessor With two microprocessors
4
-
1 and 2
5
-
11 and 12
Mirrored-channel mode
In mirrored-channel mode, the channels are paired, and both channels in a pair store the same data.
For each microprocessor, DIMM channels 2 and 3 form one redundant pair, and channel 1 is unused.
Because of the redundancy, the effective memory capacity of the compute node is half the installed
memory capacity.
Install DIMMs in pairs between the two channels in a pair. The DIMMs in each pair must be identical in
capacity, type, and number of ranks. At least one DIMM pair must be installed for each microprocessor.
Install DIMMs in the order shown in the following table.
Table 14. Mirrored-channel mode DIMM installation sequence
DIMM connectors
Installation
order
With one microprocessor With two microprocessors
1 3 and 5 3 and 5, 8 and 10
2 4 and 6 4 and 6
3
-
7 and 9
Removing a fabric connector
Use this information to remove a fabric connector.
Before you remove the fabric connector, complete the following steps:
1. Read “Safety” on page iii and “Installation guidelines” on page 637.
2. If the compute node is installed in an Flex System chassis, remove it (see “Removing a compute node
from a chassis” on page 639 for instructions).
3. Carefully lay the compute node on a flat, static-protective surface, orienting the compute node with
the bezel pointing toward you.
4. Obtain a #1 Phillips screwdriver.
When you remove the fabric connector, the UEFI firmware holds the Ethernet controller in reset and displays
a warning message, if an I/O expansion adapter is not installed in I/O expansion connector 1 to provide
connectivity to the chassis.
To remove a fabric connector, complete the following steps.
Chapter 7
.
Installing, removing, and replacing compute node components
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