Lenovo ThinkSystem SR630 Maintenance Manual page 165
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The following table shows the memory module population sequence for mirroring mode when two
processors (CPU 1 and CPU 2) are installed.
Table 48. Mirroring mode with two processors (CPU 1 and CPU 2)
Configura-
tion
1
2
16 DIMMs
1
32 DIMMs
1
2
Configura-
tion
17
18
16 DIMMs
17
32 DIMMs
17
18
Note: DIMM configurations listed in the table support the Sub NUMA Clustering (SNC) feature, which can be
enabled via UEFI. SNC is not supported if DIMM population does not follow the sequence indicated by the
table above.
PMEM and DRAM DIMM installation order
This section contains information of how to install PMEMs and DRAM DIMMs properly.
PMEM rules
Make sure to meet the following requirements when applying PMEMs in the system.
• All the PMEMs that are installed must be of the same part number.
• All the DRAM DIMMs that are installed must be of the same type, rank, and capacity with minimum
capacity of 16 GB. It is recommended to use Lenovo DRAM DIMMs with the same part number.
Setting up the system for PMEM for the first time
Complete the following steps when installing PMEMs to the system for the first time.
1. Determine the mode and combination (see "App Direct Mode" on page 160 or "Memory Mode" on page
162).
2. Consider "PMEM rules" on page 155 and acquire the PMEMs and DRAM DIMMs that meet the
requirements.
3. Remove all the memory modules that are presently installed (see "Remove a memory module" on page
148).
4. Follow the adopted combination to install all the PMEMs and DRAM DIMMs (see "Install a memory
module" on page 164).
5. Disable security on all the installed PMEMs (see "PMEM Management options" on page 155).
6. Make sure the PMEM firmware is the latest version. If not, update it to the latest version (see
sysmgt.lenovofiles.com/help/topic/com.lenovo.lxca.doc/update_fw.html
7. Configure the PMEMs so that the capacity is available for use (see "PMEM Management options" on
page 155).
PMEM Management options
PMEMs can be managed with the following tools:
• Lenovo XClarity Provisioning Manager (LXPM)
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Chapter 4
Hardware replacement procedures
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https://
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