Identifying a failed DIMM from the ACM
If a DIMM is suspected of failing, you can check the web UI or use the FRU command
line verification from the ACM.
The DD4400 system has 24 memory slots distributed across two memory channels.
The following figure shows the physical layout of the memory slots. The bottom of the
image represents the front of the cabinet.
Figure 24 DIMM slot configuration
The following tables lists the memory channel mapping, and the DIMM configuration
for each capacity point.
Table 7
DIMM memory channel mapping
Processor Channel 0 Channel 1 Channel 2 Channel 3 Channel 4 Channel 5
1 A1 + A7 A2 + A8 A3 + A9 A4 + A10 A5 + A11 A6 + A12
2 B1 + B7 B2 + B8 B3 + B9 B4 + B10 B5 + B11 B6 + B12
Table 8 Storage configuration to memory slot mapping
Storage configuration Memory slots used
4 TB A1, A2
16 TB A1, A2, A3, A4, A5, A6
32 TB A1, A2 A3, A4, A5, A6, A7, A8
Procedure
1. Access the web UI and check for alerts in the Health screen. Click an alert for
more details.
2. From the ACM, use SSH to connect to the ACM command line by typing the
following command: ssh [administrator name]-dp4400-[ACM url]
For example: ssh admin@acme-dp4400-ACM.lab.acme.com
Remove and replace assemblies
Identifying a failed DIMM from the ACM 39
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