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• DCPMM Configuration

DCPMM contains spared internal cells to stand in for the failed ones. When the spared cells are exhausted

to 0%, there will be an error message, and it is advised to back up data, collect service log, and contact

Lenovo support.

There will also be a warning message when the percentage reaches 1% and a selectable percentage

(10% by default). When this message appears, it is advised to back up data and run DCPMM diagnostics

(see

https://sysmgt.lenovofiles.com/help/topic/LXPM/running_diagnostics.html

percentage that the warning message requires, go to Intel Optane DCPMMs ➙ DCPMM Configuration,

and input the percentage.

Alternatively, change the selectable percentage with the following command in OneCLI:

onecli.exe config set IntelOptaneDCPMM.PercentageRemainingThresholds 20

Where 20 is the selectable percentage.

Adding memory modules with DCPMMs

Follow the instructions in this section to add memory modules to the existing configuration with DCPMMs.

If DCPMMs are already installed and configured in the system, complete the following steps to add new

memory modules.

1. Update the system firmware to the latest version (see "Updating firmware" on page 10).

2. Consider the following DCPMM requirements before acquiring new DCPMM units.

• All the DCPMMs 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 of the same part number.

3. See "Memory module installation rules" in ThinkSystem SR630 Maintenance Manual to determine the

new configuration, and acquire memory modules accordingly.

4. If the DCPMMs are in Memory Mode and will stay in Memory Mode after new units are installed, follow

the combination in Memory Mode to install the new modules in the correct slots. Otherwise, go to the

next step.

5. Make sure to back up the stored data.

6. If the App Direct capacity is interleaved:

a. Delete all the created namspaces and filesystems in the operating system.

b. Perform secure erase on all the DCPMMs that are installed. Go to Intel Optane DCPMMs ➙

Security ➙ Press to Secure Erase to perform secure erase.

Note: If one or more DCPMMs are secured with passphrase, make sure security of every unit is

disabled before performing secure erase. In case the passphrase is lost or forgotten, contact Lenovo

service.

7. Follow the slot combination in "Memory module installation rules" in ThinkSystem SR630 Maintenance

Manual to install all the DCPMMs and DRAM DIMMs.

8. Disable security on all the installed DCPMMs (see "Configuring DC Persistent Memory Module

(DCPMM)" on page 12).

Chapter 2

Hardware removal, installation and management guidelines

). To adjust the selectable