IBM HS22 - BladeCenter - 7870 Installation And User Manual page 44
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- Installation and user manual (106 pages) ,
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Table 4. System memory configuration for independent channel mode (2 microprocessors)
Installed
memory
1
2
2 DIMMs
X
3 DIMMs
X
4 DIMMs
X
5 DIMMs
X
6 DIMMs
X
7 DIMMs
X
X
8 DIMMs
X
X
9 DIMMs
X
X
10 DIMMs
X
X
11 DIMMs
X
X
12 DIMMs
X
X
v Mirrored channel mode: In mirrored channel mode, channels 2 and 5 are
Table 5. System memory configuration for mirrored channel mode (1 microprocessor)
Installed
memory
1
2
2 DIMMs
X
4 DIMMs
X
X
Table 6. System memory configuration for mirrored channel mode (2 microprocessors)
Installed
memory
1
2
4 DIMMs
X
6 DIMMs
X
X
8 DIMMs
X
X
v Spare channel mode: In spare channel mode, channel 2 is the spare of the active
30
BladeCenter HS22 Type 7870, 1936, and 1911: Installation and User's Guide
3
4
5
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
unused. The memory contents on channel 0 are duplicated in channel 1, and the
memory contents of channel 3 are duplicated in channel 4. The effective memory
available to the system is only half of that installed. The maximum available
memory (with 16 GB DIMMs) is 32 GB for a single CPU system and 64 GB for a
dual CPU system.
Important: The memory configuration of channel 0 must match that of channel
1, and the memory configuration of channel 3 must match that of channel 4. For
example, if a 4 GB Dual Rank DIMM is installed into the DIMM2 connector,
then a 4 GB Dual Rank DIMM must also be installed into the DIMM6 connector.
Table 2 on page 29 lists each channel and which DIMM connectors belong to the
channel.
The following table shows the order that memory DIMMs are installed to use a
mirrored channel mode.
3
4
5
X
3
4
5
X
X
channels 0 and 1. The spare channel is not available as active memory. The
maximum memory available (with 16 GB DIMMs) is 64 GB in a single CPU
system and 128 GB in a dual CPU system. All three channels must have
DIMM socket
6
7
8
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
DIMM socket
6
7
8
X
X
DIMM socket
6
7
8
X
X
X
X
X
X
X
9
10
11
X
X
X
X
X
X
X
X
X
X
X
X
X
9
10
11
9
10
11
X
12
X
X
X
X
X
X
X
12
12
X
X
X
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