Table 3. Specifications (continued)
Specification
Description
Security Fully compliant with NIST 800-131A. The security cryptography mode set by the
managing device (CMM or Lenovo XClarity Administrator) determines the security
mode in which the compute node operates.
Environment The ThinkSystem SN550 compute node complies with ASHRAE Class A2
specifications. Depending on the hardware configuration, some models comply with
ASHRAE Class A3 specifications. System performance may be impacted when
operating temperature is outside ASHRAE A2 specification or fan failed condition.
The Lenovo ThinkSystem SN550 compute node is supported in the following
environment:
• Air temperature:
– Operating:
– ASHRAE Class A2: 10 °C - 35 °C (50 °F - 95 °F); decrease the maximum
ambient temperature by 1 °C for every 300 m (984 ft) increase in altitude
above 900 m (2,953 ft)
– ASHRAE Class A3: 5 °C - 40 °C (41 °F - 104 °F); decrease the maximum
ambient temperature by 1 °C for every 175 m (574 ft) increase in altitude
above 900 m (2,953 ft)
– Compute node off: 5°C to 45°C (41°F to 113°F)
– Shipment/Storage: -40 °C to 60 °C (-40 °F to 140 °F)
• Maximum altitude: 3,050 m (10,000 ft)
• Relative Humidity (non-condensing):
– Operating:
– ASHRAE Class A2: 8% - 80%, maximum dew point: 21°C (70°F)
– ASHRAE Class A3: 8% - 85%, maximum dew point: 24°C (75°F)
– Shipment/Storage: 8% - 90%
• Particulate contamination
Attention: Airborne particulates and reactive gases acting alone or in combination
with other environmental factors such as humidity or temperature might pose a
risk to the server. For information about the limits for particulates and gases, see
“Particulate contamination” on page 122.
Notes: Future support is planned for the single M.2 backplane function in the UEFI Setup page. Currently,
users are unable to enable this functionality. This functionality is found in the following paths in the UEFI
setup page.
• F1 Setup ➙ System Settings ➙ Device and I/O Ports ➙ Enable/Disable Onboard Device(s)
• F1 Setup ➙ System Settings ➙ Device and I/O Ports ➙ Enable/Disable Adapter Option ROM
Support
• F1 Setup ➙ System Settings ➙ Device and I/O Ports ➙ Set Option ROM Execution Order
Firmware updates
Several options are available to update the firmware for the server.
You can use the tools listed here to update the most current firmware for your server and the devices that are
installed in the server.
Note: Lenovo typically releases firmware in bundles called UpdateXpress System Packs (UXSPs). To ensure
that all of the firmware updates are compatible, you should update all firmware at the same time. If you are
updating firmware for both the Lenovo XClarity Controller and UEFI, update the firmware for Lenovo XClarity
Controller first.
4
ThinkSystem SN550 Compute Node Maintenance Manual
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