Lenovo Flex System x220, Инструкция по установке и обслуживанию

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After you install the DIMM, complete the following steps:
1. Install the cover onto the compute node (see “Installing the compute node cover” on page 644 for
instructions).
2. Install the compute node into the chassis (see “Installing a compute node in a chassis” on page 639
for instructions).
Independent-channel mode
Independent-channel mode provides no redundancy.
There is no matching requirement for DIMMs in independent-channel mode. At least one DIMM must be
installed for each microprocessor. Install DIMMs in the order shown in the following tables.
Table 12. Independent-channel mode DIMM installation sequence
DIMM connectors
Installation order With one microprocessor With two microprocessors
1 5 5 and 8
2 3 3
3 1 10
4 6 1
5 4 12
6 2 6
7
-
7
8
-
4
9
-
9
10
-
2
11
-
11
Rank-sparing mode
In rank-sparing mode, one rank is held in reserve as a spare of the other ranks in the same channel.
If an error threshold is surpassed in an active rank, the contents of that rank are copied to the spare rank in
the same channel. The failed rank is taken offline, and the spare rank becomes active. Rank sparing in a
channel is independent of rank sparing in other channels.
If a channel contains only one DIMM and the DIMM is single-rank or dual-rank, do not attempt to use rank
sparing. At least one DIMM pair must be installed for each microprocessor. If you are using all quad-rank
DIMMs, use the installation sequence for independent-channel mode (see Table 12 “Independent-channel
mode DIMM installation sequence” on page 658). If you are using a combination of single-rank, dual-rank,
and quad-rank DIMMs, install DIMMs in the order shown in the following table.
Table 13. Rank-sparing mode DIMM installation sequence
DIMM connectors
Installation
order
With one microprocessor With two microprocessors
1 5 and 6 5 and 6, 7 and 8
2 3 and 4 3 and 4
3 1 and 2 9 and 10
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Flex System x220 Compute Node Installation and Service Guide