MPE/iX System Utilities Reference Manual (32650-90908)

UPSUTIL for MPE/iX
UPSUTIL Commands
Chapter 32
242
Powerfail Grace Period The powerfail grace period configuration option allows you to specify a “grace
period” (a delay time) following the detection of a UPS power failure by the UPS Monitor during which the
UPS Monitor will wait to see if AC power returns to that UPS. If power is restored to the UPS before the grace
period has elapsed, then the UPS Monitor will NOT commence execution of the user’s “powerfail command
file” (if a powerfail command file has been configured). But if power does not return to the UPS device by the
time that the grace period has elapsed, then the UPS Monitor will commence execution of the “powerfail
command file”, if one is configured.
If no “powerfail command file” is configured via the UPS Monitor configuration file, then the setting of the
powerfail grace period is immaterial. If a powerfail grace period is configured but no powerfail command file
is configured, then the setting of the powerfail grace period has no effect upon the UPS Monitor’s operation in
response to a UPS device power failure report.
parameter name: powerfail_grace_period
parameter values:
(a) nnnn — integer number of seconds in the grace period.
Minimum value: 0, Maximum value: 1800 seconds.
Powerfail Low Battery The powerfail low battery configuration option allows you to specify one of two
behaviors of the UPS Monitor following its detection of a “low battery charge” condition from any configured
UPS device. The choices of behavior are:
(a) System Abort: UPS Monitor is to perform an intentional special system abort at “low battery” detection, in
order to guarantee the correctness of data stored on disk devices in case AC power to one or more disk drives
does fail exactly at a time when the disk device is performing a “write data” operation on the disk. (Present
models of SCSI disk devices can not by themselves guarantee not to write a partial sector of data if they
happen to be writing data when their power disappears.)
(b) Keep Running: UPS Monitor is commanded NOT to perform its intentional system abort at “low battery”
detection time. Rather, it is to allow the system to keep running even after the “low UPS battery” condition
has been detected. This option gives the system approximately two more minutes of operation than it would
have if the “system abort” option were specified, in the hope that this will be sufficient additional time to
complete an orderly system shutdown before power to the disk device(s) is actually lost.
NOTE The use of the “keep running” option is entirely at the discretion and responsibility of the HP
e3000 system manager. While making this option available for users who wish to use it,
Hewlett-Packard DOES NOT RECOMMEND USE OF THIS OPTION, and CAN NOT
ASSURE USERS THAT THERE WILL NOT BE CORRUPTION OF DATA STORED ON DISK
DEVICES should this option be used.
parameter name: powerfail_low_battery
parameter values:
(a) system_abort
To cause UPS Monitor to execute a special “low UPS battery system abort” operation whenever a configured
UPS device signals “low battery charge condition” to the UPS Monitor.
(b) keep_running
To cause UPS Monitor to report any “low battery charge condition” to the system console and system log file,
but thereafter to keep the system running. There will be no intentional system abort from the UPS Monitor in
this case.