NonStop NS1200 Planning Guide

AC Power Monitoring
Integrity NonStop NS1200 servers require either the optional HP model R5500 XR UPS (with
one or two ERMs for additional battery power) or a user-supplied UPS installed in each modular
cabinet, or a user-supplied site UPS to support system operation through power transients or
an orderly system shutdown during a power failure.
If the HP R5500 XR UPS is installed, it is connected to the system’s dedicated service LAN via
the maintenance switch where OSM monitors the power state.
When properly configured, OSM power-failure support for Integrity NonStop NS1200 systems
includes:
• Detection and notification of power failure situations
• Monitoring the outage against a configurable ride-through time in order to avoid disruption
if the power failure is short in duration
• If the ride-through time expires before the power returns, initiating a controlled shutdown
of I/O operations and processors. (This shutdown does not include stopping or powering
off the system, nor does it stop TMF or other applications. Customers are encouraged to
execute scripts to shut down database activity before the processors are shut down.)
You must perform these actions in the OSM Service Connection:
• Perform the Configure a Power Source as UPS action to configure the power rail (either A
or B) connected to the UPS.
• Perform the Configure a Power Source as AC action, to configure the power rail (either B
or A) connected to AC power.
• Perform the Verify Power Fail Configuration, located under the System object, to verify
that power failure support has been properly configured and is in place for the system.
80 Operations and Management Using OSM Applications