v Spare channel mode: In Spare Channel Mode, channel 2 is the spare of the
active channels 0 and 1. Channel 5 is the spare of the active channels 3 and 4.
The spare channel is not available as active memory. When using spare channel
mode, two-thirds of the installed memory is available as active memory. The
maximum memory available (with 16 GB DIMMs) is 96GB in a single CPU
system and 96 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 56).
The following table shows the order that memory DIMMs are installed to use
spare channel mode.
Table 6. System memory configuration for spare channel mode (1 microprocessor)
Installed
memory
DIMM socket
1 2 3 4 5 6 7 8 9 101112131415161718
3
DIMMs
XXX
6
DIMMs
XX XX XX
9
DIMMs
XXXXXXXXX
Table 7. System memory configuration for spare channel mode (2 microprocessors)
Installed
memory
DIMM socket
1 2 3 4 5 6 7 8 9 101112131415161718
6
DIMMs
XXXXXX
9
DIMMs
XX XX XX X X X
12
DIMMs
XX XX XX XX XX XX
15
DIMMs
XXXXXXXXX XX XX XX
18
DIMMs
XXXXXXXXXXXXXXXXXX
32 BladeCenter HS22V Type 7871 and 1949: Installation and User's Guide
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