PMEM and DRAM DIMM installation order
This section contains information of how to install PMEMs and DRAM DIMMs properly.
When PMEMs and DRAM DIMMs are mixed in the system, the following modes are supported:
• “App Direct Mode” on page 164
Note: Only App Direct Mode is supported. Memory Mode and Mixed Mode are not supported.
See the following topics to learn how to set up and configure PMEMs.
• “PMEM rules” on page 159
• “Setting up the system for PMEM for the first time” on page 159
• “PMEM Management options” on page 159
• “Adding or replacing PMEMs in App Direct Mode” on page 162
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.
• Make sure that dual-rotor fan modules are installed in the system. If not, follow the instructions in “Install
the dual-rotor fan module upgrade kit” on page 178 to install the dual-rotor fan upgrade kit.
• Supported types of DRAM DIMMs and capacity vary with processors:
– Processors with model name ending in H:
– DRAM: 32/64 GB RDIMMs
– PMEM: 128 GB
– Processors with model name ending in HL:
– DRAM: 128 GB 3DS RDIMMs
– PMEM: 128, 256 or 512 GB
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. Consider “PMEM rules” on page 159 and acquire the PMEMs and DRAM DIMMs that meet the
requirements.
2. Remove all the memory modules that are presently installed (see “Remove a memory module” in
Maintenance Manual).
3. Follow the adopted combination to install all the PMEMs and DRAM DIMMs (see “Install a memory
module” on page 201).
4. Disable security on all the installed PMEMs (see “PMEM Management options” on page 159).
5. Make sure the PMEM firmware is the latest version. If not, update it to the latest version (see
https://
sysmgt.lenovofiles.com/help/topic/com.lenovo.lxca.doc/update_fw.html
).
6. Configure the PMEMs so that the capacity is available for use (see “PMEM Management options” on
page 159).
PMEM Management options
PMEMs can be managed with the following tools:
Chapter 5. Server hardware setup 159
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