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Table 4. System memory configuration for independent channel mode (2 microprocessors) (continued)
Installed
memory
1
8 DIMMs
X
9 DIMMs
X
10
X
DIMMs
11
X
DIMMs
12
X
DIMMs
• Mirrored channel mode: In mirrored channel mode, channels 2 and 5 are 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 "Memory channel configuration" on page 25 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.
Table 5. System memory configuration for mirrored channel mode (1 microprocessor)
Installed
memory
1
2 DIMMs
4 DIMMs
X
Table 6. System memory configuration for mirrored channel mode (2 microprocessors)
Installed
memory
1
4 DIMMs
6 DIMMs
X
8 DIMMs
X
• Spare channel mode: In spare channel mode, channel 2 is the spare of the active 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 identical
population with regards to size and organization. DIMMs within a channel do not have to be identical. The
population ordering for spare channel mode is shown in the table below.
Note: Spare channel mode is only supported if the blade server has an Intel Xeon 5600 series
microprocessor. Use the Setup utility to view the system summary and verify the type of microprocessor
installed in your blade server (see "Using the Setup utility" on page 53).
The following table shows the order that memory DIMMs are installed to use spare channel mode.
26
BladeCenter HS22 Blade ServerInstallation and User's Guide
2
3
4
X
X
X
X
X
X
X
X
X
X
X
X
X
X
2
3
4
X
X
2
3
4
X
X
X
DIMM socket
5
6
7
X
X
X
X
X
X
X
X
X
X
X
X
DIMM socket
5
6
7
X
X
X
DIMM socket
5
6
7
X
X
X
X
X
X
8
9
10
11
X
X
X
X
X
X
X
X
X
X
X
X
X
8
9
10
11
8
9
10
11
X
X
X
12
X
X
X
X
X
X
12
12
X
X
X
X
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