NonStop NS-Series Operations Guide (H06.12+)

For more information, see the appropriate Installation Manual for your Integrity NonStop NS16000
series, NS14000, NS1200, or NS1000 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 and ERM 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.
• Information about maintenance and charging of batteries in I/O enclosures is located in the
Support and Service Library for NonStop S-series servers. Spare batteries for I/O enclosures
require charging every six months.
Power Failure Recovery
After a power failure, if AC power is restored to a NonStop NS-series server while the batteries
are still holding up the system, it will not be necessary to restart the system. Resume operations.
Depending on the configuration of UPS resources, power failure can last long enough to leave
the system with some processors down because the batteries were drained to the point where
the processors can no longer operate. In conjunction with an internal UPS, a homogeneous power
off can be configured to avoid this condition.
If the power failure lasts long enough to drain the batteries completely, the system Power/Fail
should stop the system. When power is restored, the operator must then restart the system.
Procedure to Recover From a Power Failure
After power is restored:
1. Power on the system using OSM LLL described in Powering On a System on page 15-2.
2. Log on to the OSM Service Connection and check the status of all system components to
make sure they are started.
3. Use SCF commands to check the status of external devices and, if necessary, to restart any
external devices to bring them back online.
Setting System Time
Setting the system time is not normally required following a power failure. System time is
maintained by a time-of-day battery in the p-switch, IOAM, or VIO logic board that is not affected
by a power outage. If required, however, you can set the system time, either programmatically
Power Failure Recovery 153