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AC Power-Fail States
These states occur when a power failure occurs and an optional HP model R12000/3 UPS is
installed in each cabinet within the system:
DescriptionSystem State
NonStop operating system is running normally.NSK_RUNNING
OSM has detected a power failure and begins timing the
outage. AC power returning terminates RIDE_THRU and
puts the operating system back into an NSK_RUNNING
state. At the end of the predetermined RIDE_THRU time,
if AC has not returned, OSM executes a PFAIL_SHOUT
and initiates an orderly shutdown of I/O operations and
resources.
RIDE_THRU
Normal halt condition. Halted processors do not
participate in power-fail handling. A normal power-on
also puts the processors into the HALTED state.
HALTED
Loss of optic power from the NonStop Server Blade
occurs, or the UPS batteries suppling the server blade are
completely depleted. When power returns, the system is
essentially in a cold-boot condition.
POWER_OFF
AC Power-Fail States 97