HP-UX Reference (11i v1 05/09) - 1M System Administration Commands A-M (vol 3)

e
envd(1M) envd(1M)
(Series 800 Only)
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 sensing
hardware. Over-temperature and fan failure limits vary, depending on the hardware. Each system proces-
sor defines its own thresholds for supported equipment combinations. The table below shows temperature
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 operating 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 system 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.
FILES
/usr/sbin/envd envd executable file
/etc/envd.conf default envd configuration file
/etc/syslog.conf default syslog configuration file
HP-UX 11i Version 1: September 2005 − 2 − Hewlett-Packard Company Section 1M−−205