Redundant Hot-Plug Fans - HP ProLiant DL385 User Manual

74 HP ProLiant DL385 Server User Guide

Redundant hot-plug fans

In the standard configuration, five fans cool the server. For the redundant
configuration, three additional fans are added to allow the server to continue
operation in non-redundant mode if any one fan fails.
The server supports variable fan speeds to allow the speed of all fans to increase
if the temperature in any area increases. The fans will run at minimum speed
until a temperature change requires a fan speed increase to cool the server.
The server shuts down in the following scenarios:
•
At POST:
– The BIOS suspends the server for 5 minutes if it detects a cautionary
– The BIOS performs an orderly shutdown if less than five fans are
– The server performs an immediate shutdown if it detects a critical
•
In the OS:
– With the health driver loaded and thermal shutdown enabled in RBSU,
NOTE: This procedure shows images of the SCSI model server, but it
also applies to the SAS model server.
temperature level. If the cautionary temperature level is still detected after
5 minutes, the BIOS performs an orderly shutdown and then restarts. This
process repeats until the cautionary temperature level is no longer
detected.
operating in the standard configuration or if less than seven fans are
operating in the redundant configuration.
temperature level.
IMPORTANT: An immediate shutdown is a hardware-controlled
function and it overrides any firmware or software actions.
the health driver performs an orderly shutdown if it detects a cautionary
temperature level. If the server detects a critical temperature level before
the orderly shutdown occurs, the server performs an immediate shutdown.
Additionally, the health driver performs an orderly shutdown if less than
five fans are operating in the standard configuration, or if less than seven
fans are operating in the redundant configuration.