NonStop S-Series Planning and Configuration Guide (G06.29+)

System Components
HP NonStop S-Series Planning and Configuration Guide—523303-021
4-25
ServerNet Adapters
MSEBS in S7800, S7800B, S76000, S86000, and later Servers
In enclosures containing model 1962, 1971, 1972, 1975 or later PMF CRUs:
•
MSEBs, not SEBs, occupy slots 51 and 52 of all processor enclosures, 01 through
08 and must not be configured for ECL cables between processor enclosures.
•
Either SEBs or MSEBs can occupy slots 53 and 54 of processor enclosures 01
through 04.
•
Because I/O enclosures are not supported on slots 53 and 54 of processor
enclosures 05 through 08, neither SEBs nor MSEBs can occupy these slots.
•
Processor enclosures are connected together with serial-copper or fiber-optic
cables only.
•
In a two-processor system, ServerNet adapters can occupy slots 51 and 52
because MSEBs are not required to expand the system to more than two
processors.
ServerNet Adapters
ServerNet adapters provide the interface between the ServerNet communications
network and a particular I/O bus, such as an Ethernet or SCSI bus.
ServerNet adapters can be installed in slots 51, 52, 53, and 54 of both processor
enclosures and I/O enclosures. Slot assignments for ServerNet adapters depend upon
the topology and the type of enclosure. For specific information, see Slot Assignments
for Slots 51 Through 54 on page 4-27.
ServerNet Adapter Description
A ServerNet adapter contains:
•
One ServerNet bus interface (SBI)
The SBI is an application-specific integrated circuit (ASIC) that provides the
interface between the ServerNet communications network and the different
industry-standard bus within the adapter, such as the Motorola 68030 bus, to which
SACs are attached.
•
One or more ServerNet addressable controllers (SACs)
SACs provide the controller functions for ServerNet adapters: the interfaces to
buses such as SCSI buses, which connect to peripheral devices.
Supported ServerNet Adapters
The ServerNet adapters currently supported on systems are listed in Appendix F,
Supported Hardware and Configurations. Information about each adapter is given in
the manual specific to that adapter. Refer to Appendix E, Guide to Server Manuals, for
a complete list of NonStop S-series manuals.