Lenovo ThinkSystem SN850 - Page 48

If you have installed a DCPMM:
1. Update the system firmware to the latest version (see
“Update the firmware” on page 69).
2. Make sure the firmware of all the DCPMM units 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).
3. Restore the data that have been backed up if necessary.
DC Persistent Memory Module (DCPMM) setup
Follow the instructions in this section to complete required setup before installing DCPMMs for the first time,
determine the most suitable configuration, and install memory modules accordingly.
Complete the following steps to finish system setup to support DCPMMs, and install the memory modules
according to the designated combination.
1. Update the system firmware to the latest version that supports DCPMMs (see
“Update the firmware” on
page 69
).
2. Make sure to meet all the following requirements before installing DCPMMs.
• 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. Refer to
“DC Persistent Memory Module (DCPMM) installation order” on page 40 to determine the most
suitable combination and the following:
• Number and capacity of the DCPMMs and DRAM DIMMs to install.
• Check if the presently installed processors support the combination. If not, replace the processors
with ones that support the combination.
4. Based on the determined DCPMM combination, acquire the DCPMMs, DRAM DIMMs and processors if
necessary.
5. Replace the processors if necessary (see “Processor and heat sink replacement” in Maintenance
Manual).
6. Remove all the memory modules that are installed (see “Remove a memory module” in Maintenance
Manual).
7. Follow the slot combination in
“DC Persistent Memory Module (DCPMM) installation order” on page 40
to install all the DCPMMs and DRAM DIMMs (see “Install a DIMM” on page 37).
8. Make sure the DCPMM 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
).
Notes:
• When adding more DCPMM to the existing configuration, make sure to update all the DCPMM firmware to
the latest level.
• The system currently supports only Memory Mode with DCPMM. Any operation that changes the system
to other modes with DCPMM could cause data lost or damage in certain circumstances.
DC Persistent Memory Module (DCPMM) installation order
This section contains information of how to install DC Persistent Memory Module (DCPMM) and DRAM
DIMMs.
For more information about the processors compatibility, see
https://static.lenovo.com/us/en/serverproven/
index.shtml
.
40 ThinkSystem SN850 Compute Node Setup Guide