NonStop NS-Series Planning Guide (H06.04+)

Control, Configuration, and Maintenance Tools
HP Integrity NonStop NS-Series Planning Guide—529567-005
B-21
System-Down OSM Low-Level Link
For information on how to configure and start OSM server-based processes and
components, see the OSM Migration Guide. These are the OSM components:
System-Down OSM Low-Level Link
In Integrity NonStop NS-series systems, the maintenance entity (ME) in the p-switches
provides dedicated service LAN services via the OSM Low-Level Link for both OS
coldload, system management, and hardware configuration when hardware is powered
up but the OS is not running. LAN connections are direct from the maintenance PIC in
slot 1 of the p-switch to the maintenance switch that is installed in the modular cabinet.
This illustration shows the LAN connections for the OSM Low-Level Link:
AC Power Monitoring
Unlike previous NonStop servers that used internal batteries for memory hold-up
through power failures, Integrity NonStop NS-series servers require either the optional
HP model R5500 XR UPS (with one or two ERMs for additional battery power)
installed in each modular cabinet or a user-supplied site UPS to support system
operation through power transients or an orderly system shutdown in a power failure.
If an 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 of either AC on
or AC off. If a power outage occurs, OSM starts a ride-through timer and outputs EMS
notification that the system is running on the UPS batteries. The ride-through timer can
Product ID Component Task Performed
T0632 OSM Notification Director Remote services (dial-in, dial-out)
T0633 OSM Low-Level Link Down-system support
T0634 OSM Console Tools Start menu shortcuts and default home pages for
easy access to the OSM Service Connection and
OSM Event Viewer (browser-based OSM
applications that are not installed on the system
console)
VST344.vsd
Maintenance Switch
Processor
Switch
X Fabric
Maintenance PIC - Enet
(Slot 1, Port 3)
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Processor
Switch
Y Fabric
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2
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