IBM BladeCenter HS22

Table 4. System memory configuration for independent channel mode (2 microprocessors)
Installed
memory
DIMM socket
123456789101112
2 DIMMs X X
3 DIMMs X X X
4 DIMMs X X X X
5 DIMMs X X X X X
6 DIMMs X X X X X X
7 DIMMs X X X X X X X
8 DIMMs X X X X X X X X
9 DIMMs X X X X X X X X X
10 DIMMs X X X X X X X X X X
11 DIMMs X XXXXXXXXX X
12 DIMMs X XXXXXXXXXXX
v 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, ifa4GBDual Rank DIMM is installed into the DIMM2 connector,
thena4GBDual 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.
Table 5. System memory configuration for mirrored channel mode (1 microprocessor)
Installed
memory
DIMM socket
123456789101112
2 DIMMs X X
4 DIMMs X X X X
Table 6. System memory configuration for mirrored channel mode (2 microprocessors)
Installed
memory
DIMM socket
123456789101112
4 DIMMs X X X X
6 DIMMs X X X X X X
8 DIMMs X X X X X X X X
v 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
30 BladeCenter HS22 Type 7870 and 1936: Installation and User's Guide