– ASHRAE class A3: 5–40°C (41–104°F); when the altitude exceeds 900 m (2953 ft), the maximum
ambient temperature value decreases by 1°C (1.8°F) with every 175 m (574 ft) of altitude increase.
– ASHRAE class A4: 5–45°C (41–113°F); when the altitude exceeds 900 m (2953 ft), the maximum
ambient temperature value decreases by 1°C (1.8°F) with every 125 m (410 ft) of altitude increase.
– Server off: 5–45°C (41–113°F)
– Shipping or storage: -40–60°C (-40–140°F)
• Maximum altitude: 3050 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)
– ASHRAE class A4: 8%–90%; maximum dew point: 24°C (75°F)
– Shipping or 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 204.
Note:
Your server complies with ASHRAE class A2 specifications. The server performance might be
impacted when the operating temperature is outside the ASHRAE A2 specifications. Depending on the
hardware configuration, some server models comply with ASHRAE class A3 and class A4 specifications. To
comply with ASHRAE class A3 and class A4 specifications, the server models must meet the following
hardware configuration requirements at the same time:
• Fan 4 installed
• Two hot-swap power supplies installed
• NVMe SSD not installed
• Graphics adapters not installed
• SAS drives with capacity larger than or equal to 2 TB not installed in the expansion drive cage
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.
Best practices related to updating firmware is available at the following location:
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.
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Summary of Contents for ThinkSystem ST550 7X09
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