HP-UX Reference (11i v2 04/09) - 1M System Administration Commands A-M (vol 3)

e
envd(1M) envd(1M)
FANFAIL_CRIT:y
/usr/bin/rcp critical_appl_files \
remote_machine:/backup
FANFAIL_EMERG:y
/usr/sbin/reboot -qh
Only users with appropriate privileges can invoke
envd.
Over-temperature and Fan Failure Handling
Over-temperature and fan failure handling is supported only on systems equipped with appropriate sens-
ing hardware. Over-temperature and fan failure limits vary, depending on the hardware. Each system
processor defines its own thresholds for supported equipment combinations. The table below shows tem-
perature and fan failure states. For the temperature ranges and fan states specific to your system
configuration, refer to any of the following documents for your system: Site Planning and Preparation
Guide, Installation and Configuration Guide,orOperator Handbook.
State State Description
NORMAL Within normal operating temperature range
Temperature has exceeded the normal operating
range of the system, but is still within the operat-
ing limit of the hardware media.
OVERTEMP_CRIT
Temperature has exceeded the maximum specified
operating limit of hardware media; power loss is
imminent. A minimum of about 60 seconds is
guaranteed between the OVERTEMP_MID state and
the OVERTEMP_POWERLOSS (power loss) state.
OVERTEMP_EMERG
Hardware will disconnect all power from all cards
in the system chassis.
OVERTEMP_POWERLOSS
All chassis fans are operating normally.FAN_NORMAL
One or more chassis fans have failed, but the sys-
tem has enough redundant fans to allow continued
operation while the failed fans are replaced.
FANFAIL_CRIT
Chassis fan failures prevent continued operation of
the system; power loss is imminent.
FANFAIL_EMERG
Hardware will disconnect all power from all cards
in the system chassis.
FANFAIL_POWERLOSS
The syslog priorities mapped to the environmental events are:
LOG_EMERG (for
OVERTEMP_EMERG and FANFAIL_EMERG) and LOG_CRIT (for OVERTEMP_CRIT
and
FANFAIL_CRIT).
Any non-shutdown activities (e.g. file transfer) should be performed at
OVERTEMP_CRIT and
FANFAIL_CRIT. It is important to configure only critical activities for OVERTEMP_CRIT because the
over-temperature might rise dramatically fast to OVERTEMP_EMERG
. It is recommended to perform a
quick shutdown using
/usr/sbin/reboot -qh at OVERTEMP_EMERG
and FANFAIL_EMERG to
preserve file system data integrity. If the hardware enters the
OVERTEMP_POWERLOSS or
FANFAIL_POWERLOSS state and the system has not been shut down, the sudden loss of power could
result in data loss. Note that power-fail recovery functionality is not available in this case. When the
hardware powers down, no warning messages are produced, and no action is taken by the system.
Whenever an environmental state changes from one level to another (such as from
NORMAL to
OVERTEMP_CRIT or from FANFAIL_CRIT to FANFAIL_EMERG), the warning message, if specified, is
logged, and the corresponding action is executed once, and only once, per state change.
AUTHOR
envd was developed by HP.
Section 1M−−166 Hewlett-Packard Company − 2 − HP-UX 11i Version 2: September 2004