Table 1. Specifications, Type 7X18 and 7X19 (continued)
Heat output Approximate heat output:
• Minimum configuration: 454 BTU , 133 W (in BTU per hour and watts)
• Maximum configuration: 5118 BTU, 1500 W (in BTU per hour and watts)
Environment ThinkSystem SR850 complies with ASHRAE Class A2 specifications. Depending on the
hardware configuration, some models comply with ASHRAE Class A3 and Class A4
specifications. System performance may be impacted when operating temperature is
outside AHSARE A2 specification.
• Air temperature:
– Operating
– ASHARE Class A2: 10°C to 35°C (50°F to 95°F); the maximum ambient
temperature decreases by 1°C for every 300 m (984 ft) increase in altitude
above 900 m (2,953 ft).
– ASHARE Class A3: 5°C to 40°C (41°F to 104°F); the maximum ambient
temperature decreases by 1°C for every 175 m (574 ft) increase in altitude
above 900 m (2,953 ft).
– ASHARE Class A4: 5°C to 45°C (41°F to 113°F); the maximum ambient
temperature decreases by 1°C for every 125 m (410 ft) increase in altitude
above 900 m (2,953 ft).
– Server 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% to 80%; maximum dew point: 21°C (70°F)
– ASHRAE Class A3: 8% to 85%; maximum dew point: 24°C (75°F)
– ASHRAE Class A4: 8% to 90%; maximum dew point: 24°C (75°F)
– Shipment/storage: 8% to 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 164.
Note: To maintain component reliability, system performance might vary at ambient temperature higher than
35°C while all the fans are functioning. With one fan failing, system performance might vary at ambient
temperature higher than 27°C.
Firmware updates
Several options are available to update the firmware for the server.
You can use the tools listed here to update most 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.
Important terminology
• In-band update. The installation or update is performed using a tool or application within an operating
system that is executing on the server’s core CPU.
• Out-of-band update. The installation or update is performed by the Lenovo XClarity Controller collecting
the update and then directing the update to the target subsystem or device. Out-of-band updates have no
dependency on an operating system executing on the core CPU. However, most out-of-band operations
do require the server to be in the S0 (Working) power state.
4
ThinkSystem SR850 Maintenance Manual
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