Lenovo 7X15, Setup Manual

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For specific information about the required installation order of memory modules in your server based on the
system configuration and memory mode that you are implementing, see
the
ThinkSystem SN850 Memory
Population Reference
.
Configure DC Persistent Memory Module (DCPMM)
Follow the instructions in this section to configure DCPMMs and DRAM DIMMs.
DCPMM capacity could act as accessible persistent memory for applications or volatile system memory.
Based on the approximate percentage of DCPMM capacity invested in volatile system memory, the following
three operating modes are available for choice:
•
App Direct Mode
(0% of DCPMM capacity acts as system memory):
In this mode, DCPMMs act as independent and persistent memory resources directly accessible by
specific applications, and DRAM DIMMs act as system memory.
The total displayed volatile system memory in this mode is the sum of DRAM DIMM capacity.
Notes:
– In App Direct Mode, the DRAM DIMMs that are installed can be configured to mirror mode.
– When only one DCPMM is installed for each processor, only not-interleaved App Direct Mode is
supported.
•
Mixed Memory Mode
(1-99% of DCPMM capacity acts as system memory):
In this mode, some percentage of DCPMM capacity is directly accessible to specific applications (App
Direct), while the rest serves as system memory. The App Direct part of DCPMM is displayed as persistent
memory, while the rest of DCPMM capacity is displayed as system memory. DRAM DIMMs act as cache
in this mode.
The total displayed volatile system memory in this mode is the DCPMM capacity that is invested in volatile
system memory.
•
Memory Mode
(100% of DCPMM capacity acts as system memory):
In this mode, DCPMMs act as volatile system memory, while DRAM DIMMs act as cache.
The total displayed volatile system memory in this mode is the sum of DCPMM capacity.
DCPMM Management options
DCPMMs can be managed with the following tools:
•
Lenovo XClarity Provisioning Manager (LXPM)
To open LXPM, power on the system and press the key specified in the on-screen instructions as soon as
the logo screen appears. If a password has been set, enter the password to unlock LXPM.
Go to
UEFI Setup
➙
System Settings
➙
Intel Optane DCPMMs
to configure and manage DCPMMs.
For more details, see the “UEFI Setup” section in the Lenovo XClarity Provisioning Manager
documentation version compatible with your server at
https://sysmgt.lenovofiles.com/help/topic/lxpm_
frontend/lxpm_product_page.html .
Note:
If the text-based interface of Setup Utility opens instead of Lenovo XClarity Provisioning Manager,
go to
System Settings
➙
<F1> Start Control
and select
Tool Suite
. Then, reboot the system and press
the key specified in the on-screen instructions as soon as the logo screen appears to open Lenovo
XClarity Provisioning Manager.
•
Setup Utility
74
ThinkSystem SN850 Compute Node Setup Guide