Lenovo ThinkSystem SR950 Setup Manual page 182

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 "Update the firmware" on page 256).
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 "DCPMM installation order" on page 176 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 "DCPMM installation order" on page 176 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 namespaces 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 "DCPMM installation order" on page 176 to install all the DCPMMs and
DRAM DIMMs (see "Install a memory module" on page 355).
8. Disable security on all the installed DCPMMs (see "Configure DC Persistent Memory Module (DCPMM)"
on page 261).
9. Make sure the DCPMM 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
10. Configure DCPMMs so that the capacity is available for use (see "Configure DC Persistent Memory
Module (DCPMM)" on page 261).
11. Restore the data that have been backed up.
App Direct Mode
In App Direct Mode, DCPMMs act as independent and persistent memory resources directly accessible by
specific applications, and DRAM DIMMs act as system memory.
When implementing App Direct Mode, any supported DIMMs in any capacity can be installed.
ThinkSystem SR950 Setup Guide
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