Internal system components
The following figure shows the layout of the CPUs and DIMMs inside the chassis. The
front of the system is at the top of the figure.
Figure 8 CPU and memory locations
DIMMs overview
Dual in-line memory modules (DIMM) come in various sizes, which must be configured
in a certain way. This topic can help you select the correct configuration when
servicing DIMMs.
The storage processor contains two Intel processors each with an integrated memory
controller that supports four channels of memory. The storage processor allows two
DIMM slots per channel, so the storage processor supports a total of 16 DIMM slots.
DD6800 memory DIMM configuration
Table 27 DD6800 memory DIMM configuration
Tier
Total Memory
Memory DIMM Configuration
DD6800 DLH
192 GB
8 x 16 GB +8 x 8 GB
DD6800 DLH Extended
Retention/DD Cloud Tier
192 GB
8 x 16 GB +8 x 8 GB
HA is supported with all available memory configurations.
To ensure maximum memory performance, there are memory DIMM population rules
for best memory loading and interleaving.
page 34 specify the DIMM location rules for various memory configurations:
Table 28 Memory locations - CPU 0
Channel A
Channel B
Channel D
Channel C
Tier
Total
Memory
0
1
2
3
4
5
6
7
DD6800 DLH
192 GB
16 GB
8 GB
16 GB
8 GB
8 GB
16 GB
8 GB
16 GB
DD6800 DLH
Extended
192 GB
16 GB
8 GB
16 GB
8 GB
8 GB
16 GB
8 GB
16 GB
Data Domain DD6300, DD6800, and DD9300 Hardware Overview
Internal system components
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