NonStop Operations Guide for H-Series and J-Series RVUs

Set Ride-Through Time
Ensure that the system is set for the proper ride-through time. The default powerfail delay time for
NonStop NS-series systems that are configured with rack-mounted UPSs is 30 seconds. Contact
HP Expert Services for the optimum ride-through time for your system.
NOTE: For NonStop BladeSystems, the ride-through time must be actively set to at least 3 minutes
to allow for possible loss of SNMP traps.
The ride-through time is set using the SCF commands to alter the POWERFAIL_DELAY_TIME
parameter. Refer to the SCF Reference Manual for the Kernel Subsystem.
Configure OSM Power Fail Support
For NonStop BladeSystems, you must also configure OSM power fail support for Enclosure 100
(and only for Enclosure 100) by performing a Configure Power Source as UPS action on one power
supply unit and performing a Configure Power Source as AC action on the other power supply unit
in the enclosure. These actions are located under the Enclosure object. Configuring power fail
support in this manner allows OSM, in the event of a power outage, to monitor the outage and,
if the AC power is not restored before the specified ride-through time period expires, to initiate an
orderly system shutdown.
For NonStop NS-series systems, you must also configure OSM power fail support by performing
a Configure Power Source as UPS action for at least one processor switch power supply unit (for
NonStop NS16000 series systems) or one IOAM or VIO power supply unit (for NonStop NS14000
series, NS1200, or NS1000 systems). Configuring at least one power supply as being powered
by UPS in the event of a power outage causes OSM to monitor a power outage and, if the AC
power is not restored before the specified ride-through time period expires, OSM initiates an
orderly system shutdown.
For more information, see the Planning Guide for your NonStop system or the OSM Service
Connection User’s Guide.
Monitor Power Supplies
Monitor power-generating equipment and run regular checks on any backup generators to make
sure that you can handle extended power outages.
Monitor Batteries
• Monitoring site UPS batteries is the responsibility of the customer. OSM does not interface
with a site UPS or batteries.
• Monitoring batteries in an internal UPS is performed using OSM.
• Monitor batteries in I/O enclosures using OSM. For more information on battery attributes
and actions, see the OSM Service Connection online help.
Maintain Batteries
Make sure that all installed batteries and spare batteries are always fully charged. Correct any
problems that are causing the batteries to become drained.
In general, batteries are constantly charging when AC power is available to a system. When
recovering from a power failure event, it will take time for the batteries to be fully charged. For
different kinds of batteries:
• Maintenance and charging of site UPS batteries is the responsibility of the customer.
• Information about maintenance and charging of batteries in an optional internal UPS and
ERM is located in documentation that comes with the products.
Preparing for Power Failure 173