NonStop S-Series Server Description Manual (G06.27+)

HP NonStop S-Series Server Description Manual—520331-004
1-1
1 Introduction
This section introduces the fundamental architecture of the NonStop S-Series Sxx000
and S7x00 servers, beginning with a physical overview and then proceeding to
describe the components and how they are linked together.
The topics covered in this section are:
Processor Enclosures and I/O Enclosures
Maximum Server Configuration
Internal Arrangement of System Enclosures
Components of Processor Multifunction (PMF) CRU
Fault-Tolerant Process Communication
Fault-Tolerant Disk Access
Maximum Processor Enclosure I/O
Expansion to Second Processor Enclosure
Expansion to External I/O Enclosure
Components of I/O Multifunction (IOMF) CRU
Multiple I/O Enclosures
Maximum I/O for a Single Processor Enclosure
Tetrahedral Topology
First Triangle of Tetrahedron
Tetrahedral Topology With Four Processor Enclosures
Maximum I/O for Four Processor Enclosures
Extending the Tetrahedral Topology
Maximum System With Single Server
ServerNet Clusters
Modular I/O
Modular I/O Connectivity
Internal Structure of the IOAM Enclosure
Physical Racking of IOAM Enclosures
Cluster Topologies for 6770 Switches
Star Topology
Split-Star Topology
Tri-Star Topology
Layered Topologies for 6780 Switches
Connections Between Zones in Layered Topology