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The server provides a QR code on the system service label, which is on the cover of the server, that you
can scan using a QR code reader and scanner with a mobile device to get quick access to the Lenovo
Service Information website. The Lenovo Service Information website provides additional information for
parts installation and replacement videos, and error codes for server support.
• RAID support
The RAID adapter provides hardware redundant array of independent disks (RAID) support to create
configurations. There are two types of optional RAID adapter. Basic RAID adapter (without flash power
module) supports RAID 0, 1, 5, and 10, advanced RAID adapter (with flash power module) supports RAID
0, 1, 5, 6, and 10. Software RAID supports RAID 0, 1, 5, and 10.
• Power throttling
By enforcing a power policy known as power-domain oversubscription, the Flex System chassis can
share the power load between two or more power supply modules to ensure sufficient power for each
device in the Flex System chassis. This policy is enforced when the initial power is applied to the Flex
System chassis or when a compute node is inserted into the Flex System chassis.
The following settings for this policy are available:
– Basic power management
– Power module redundancy
– Power module redundancy with compute node throttling allowed
You can configure and monitor the power environment by using the Chassis Management Module. For
more information, see the Flex System Chassis Management Module: Command-Line Interface Reference
Guide at http://flexsystem.lenovofiles.com/help/topic/com.lenovo.acc.cmm.doc/dw1kt_cmm_cli_book.
pdf.
• Active Memory
The Active Memory feature improves the reliability of memory through memory mirroring. Memory
mirroring mode replicates and stores data on two pairs of DIMMs within two channels simultaneously. If a
failure occurs, the memory controller switches from the primary pair of memory DIMMs to the backup pair
of DIMMs.
• Lenovo XClarity Controller (XCC)
The Lenovo XClarity Controller is the common management controller for Lenovo Lenovo ThinkSystem
server hardware. The Lenovo XClarity Controller consolidates multiple management functions in a single
chip on the server system board.
Some of the features that are unique to the Lenovo XClarity Controller are enhanced performance, higher-
resolution remote video, and expanded security options. For additional information about the Lenovo
XClarity Controller, see: http://sysmgt.lenovofiles.com/help/topic/com.lenovo.systems.management.xcc.
doc/product_page.html.
• Systems-management support
The compute node XClarity Controller provides a web interface for remote systems-management support.
You can use the interface to view system status and to control systems-management functions and
baseboard management settings.
The XClarity Controller communicates with the Lenovo Flex System Chassis Management Module (CMM)
and the Lenovo XClarity Administrator application (if installed).
– The CMM is a hot-swap module that provides systems-management functions for all components in an
Flex System chassis. It controls a serial port for remote connection and a 1 Gbps Ethernet remote-
management connection. For more information, see the Flex System Chassis Management Module:
Command-Line Interface Reference Guide at http://flexsystem.lenovofiles.com/help/topic/com.lenovo.
acc.cmm.doc/dw1kt_cmm_cli_book.pdf.
4
ThinkSystem SN850 Compute Node Setup Guide
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