HP DL380z Gen8 Virtual Workstation - Manual (Page 23)

Installing more than the required number of fans in a single-processor configuration is not a
supported configuration.
For a dual-processor configuration, six fans are required for redundancy. A fan failure or missing fan
causes a loss of redundancy. A second fan failure or missing fan causes an orderly shutdown of the
server.
The server supports variable fan speeds. The fans operate at minimum speed until a temperature
change requires a fan speed increase to cool the server. The server shuts down during the following
temperature-related scenarios:
● At POST and in the OS, HP iLO performs an orderly shutdown if a cautionary temperature level
is detected. If the server hardware detects a critical temperature level before an orderly
shutdown occurs, the server performs an immediate shutdown.
● When the Thermal Shutdown feature is disabled in RBSU, HP iLO does not perform an orderly
shutdown when a cautionary temperature level is detected. Disabling this feature does not
disable the server hardware from performing an immediate shutdown when a critical
temperature level is detected.
CAUTION: A thermal event can damage server components when the Thermal Shutdown
feature is disabled in RBSU.
Hot-plug fans 17