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Note: In mirrored channel mode, if any of the installed DIMMs does not meet the
requirements listed above, the system is executed as independent channel mode.
To install a DIMM, complete the following steps:
1. Locate the DIMM connectors (see "Blade server connectors" on page 13).
2. If a DIMM filler or another memory module is already installed in the DIMM
3. Touch the static-protective package that contains the DIMM to any unpainted
4. To install the DIMMs, repeat the following steps for each DIMM that you
68
BladeCenter HS23E Type 8038 and 8039: Problem Determination and Service Guide
One channel is used as a backup of the other, which provides redundancy. The
memory contents on channel 2 are duplicated in channel 3. Channel 1 DIMM
connectors 1, 2, 7, and 8 are not used in mirrored channel mode. The maximum
available memory (with 16 GB DIMMs) is 32 GB for a single microprocessor
system and 64 GB for a dual microprocessor system.
Important: The memory configuration of channel 2 must match that of channel
3. For example, if a 4 GB Dual Rank DIMM is installed into the DIMM connector
3 (channel 2), then a 4 GB Dual Rank DIMM must also be installed into the
DIMM connector 5 (channel 3). Table 2 on page 66 lists each channel and which
DIMM connectors belong to the channel.
The following table shows the order that memory DIMMs are installed to use
mirrored channel mode.
Table 6. System memory configuration for mirrored channel mode (one microprocessor)
DIMM pair
First
Second
Table 7. System memory configuration for mirrored channel mode (two microprocessors)
DIMM pair
First
Second
Third
Determine which DIMM connector you will be installing memory into.
connector, remove it (see "Removing a memory module" on page 65).
Note: A DIMM or DIMM filler must occupy each DIMM socket before the
blade server is turned on.
metal surface on the BladeCenter unit or any unpainted metal surface on any
other grounded rack component in the rack in which you are installing the
DIMM for at least two seconds; then, remove the DIMM from its package.
install:
DIMM connector
3 and 5
4 and 6
DIMM connector
3 and 5, 9 and 11
4 and 6
10 and 12
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