NonStop NS1000 Planning Guide (H06.05+)

Control, Configuration, and Maintenance Tools

HP Integrity NonStop NS1000 Planning Guide—542527-004

B-14

System-Down OSM Low-Level Link

In the Integrity NonStop NS1000 system, the maintenance entity (ME) in the IOAM

enclosure 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 10/100

Ethernet ports on the ServerNet switch boards in the IOAM enclosure 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

Integrity NonStop NS-series servers require a user-supplied site UPS to support

system operation through power transients or an orderly system shutdown during a

power failure.

In the event of a power outage, the system is not notified of the power outage. The

user is responsible for detecting power transients and outages and developing the

appropriate actions, which might include a ride-through time based on to the capacity

of the site UPS and the power demands made on that UPS.

Any external peripheral devices that do not have UPS support will fail immediately at

the onset of a power failure. Plan for UPS support of any external peripheral devices

that must remain operational as system resources. This support can come from a site

UPS or individual units as necessary.

Module 2

Module 3

Maintenance Switch

IOAM

Enclosure

(Group

100)

Cables to

Maintenance

Switch

10/100

ENET

SPON

VST059.vsd