Cisco UCS B440 Installatie en onderhoud - Pagina 25

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S e n d d o c u m e n t c o m m e n t s t o u c s - d o c f e e d b a c k @ c i s c o . c o m

server needs at least one matched pair of DIMMs attached to CPU 1 or CPU 2. All four CPUs can boot

and run from a single DIMM pair. DIMM pairs must be identical, but one DIMM pair on a CPU can be

different from other pairs. DIMMs installed in slots for an absent CPU will not be recognized. For

optimal performance, distribute DIMMs evenly across all CPUs. DIMM connector latches are color

coded blue, yellow, black, and white, and Cisco recommends installing memory in that order. It is also

recommended to install memory evenly across the installed CPUs.

Figure 13

Channels

Each CPU has 8 channels, consisting of 4 matched pairs. Each channel pair is identified by a letter: A,

B, C, or D for each CPU. Each channel pair member is identified by numbers, either 1 or 0.

Figure 14

of their associated CPU. When installing DIMMs, you must add them in pairs in the configurations

shown in

Table 8

# of DIMMs to Install

2 (blue)

4 (blue, white )

8 (blue, white, yellow, and black)

OL-22475-01

Memory Slots Within the Blade Server

DIMMs for CPU 4

shows how channels are physically laid out on the blade server. The DIMM slots are to the left

Table

Adding DIMMs to a CPU

Cisco UCS B440 High Performance Blade Server Installation and Service Note

Install DIMMs in Slot #

(A0, A1)

(A0, A1)–(C0, C1)

(A0, A1)–(C0, C1)–(B0, B1)–( D0, D1)

Memory and Performance