NonStop S-Series Planning and Configuration Guide (G06.26+)

The ServerNet Communications Network
HP NonStop S-Series Planning and Configuration Guide—523303-017
2-10
Comparison to NonStop K-Series Systems
Comparison to NonStop K-Series Systems
On both NonStop K-series systems and systems that use the ServerNet architecture:
•
The disk drives are connected with a SCSI bus.
•
Each processor maintains two independent paths to other processors.
•
No single failure disrupts communications among the remaining system
components.
Some of the differences between the two architectures:
This detailed logical diagram compares the NonStop K-series ServerNet architecture.
NonStop K-Series System ServerNet Architecture
Communications through
interprocessor buses (IPBs)
and I/O channels
Communications through a ServerNet communications
network:
Processor-to-processor and processor-to-ServerNet adapter
I/O controller SAC on a ServerNet adapter
VST110.vsd
ServerNet Architecture
Processor
XY
Processor
XY
ServerNet
Adapter
ServerNet
Adapter
Disks
ServerNet
Adapter
ServerNet
Adapter
ServerNet
Adapter
ServerNet
Adapter
22
NonStop K-Series Servers
Processor
XY
D
i
s
k
s
I/O Channel
IPB to other processors
I/O Channel
Processor
XY
I/O
Controller
I/O
Controller
I/O
Controller
I/O
Controller
I/O
Controller
I/O
Controller
I/O
Controller