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v Mirrored channel mode: In mirrored channel mode, the memory contents on
Attention: DIMMs or DIMM fillers must occupy DIMM connectors 1, 2, 13, 14,
15, and 16 for proper cooling.
To install a DIMM, complete the following steps:
28
BladeCenter HS23 Types 7875 and 1929: Installation and User's Guide
Table 3. DIMM population sequence for independent-channel mode and rank-sparing mode
One microprocessor installed
DIMM connectors 1, 7, 3, 5, 2, 8, 4, and 6
channel 0 are duplicated in channel 2, and the memory contents of channel 1 are
duplicated in channel 3. The effective memory available to the system is only
half of that installed. The maximum available memory (with 16 GB DIMMs) is
64 GB for a single microprocessor system and 128 GB for a dual microprocessor
system.
Important: The memory configuration of channel 0 must match that of channel
2, and the memory configuration of channel 1 must match that of channel 3. For
example, if a 4 GB Dual Rank DIMM is installed into the DIMM connector 3
(channel 0), then a 4 GB Dual Rank DIMM must also be installed into the DIMM
connector 7 (channel 2). Table 2 on page 27 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 4. DIMM population sequence for mirrored channel mode
DIMM pair
First
Second
Third
Fourth
Fifth
Sixth
Seventh
Eighth
Note: The DIMM pairs must be identical in size, type, and rank count.
1. Before you begin, read "Safety" on page v and "Installation guidelines" on
page 17.
2. Read the documentation that comes with the DIMMs.
3. If the blade server is installed in a BladeCenter unit, remove it (see
"Removing the blade server from the BladeCenter unit" on page 20 for
instructions).
4. Carefully lay the blade server on a flat, static-protective surface.
5. Open the blade server cover (see "Removing the blade server cover" on page
21 for instructions).
Two microprocessors installed
DIMM connectors 1, 16, 7, 14, 3, 9, 5, 11, 2,
15, 8, 13, 4, 10, 6, and 12
DIMM connectors
One microprocessor
installed
1 and 7
3 and 5
2 and 8
4 and 6
None
None
None
None
Two microprocessors
installed
1 and 7
14 and 16
3 and 5
9 and 11
2 and 8
13 and 15
4 and 6
10 and 12
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