NonStop NS-Series Operations Guide (H06.12+)

enclosures, for a total of eight per FCSA. The FCS Manager process assigns a SAC on an FCSA
to a particular instance of the FCS Monitor.
Up to 10 FCSAs can be housed in an I/O adapter module (IOAM), which is mounted in an IOAM
enclosure (except in Integrity NonStop NS14000 and NS1000 systems, where slot 1 is reserved
for a “4-Port ServerNet Extender (4PSE)”). The form factor and connection technology of IOAM
enclosures differ from the standard I/O enclosures that provide direct ServerNet access to external
I/O devices. A pair of ServerNet switch boards, also located in the IOAM enclosure, provide
connectivity between the processors and the FCSAs. All IOAM hardware can be monitored by
OSM.
For information about the disk drives or tape drives supported through FCSAs for your H-series
RVU, refer to the H06.nn Release Version Update.
Gigabit Ethernet 4-Port Adapter (G4SA)
The M8800 Gigabit Ethernet 4-port ServerNet adapter (G4SA) provides Gigabit connectivity
between Integrity NonStop systems and Ethernet LANs. G4SAs are installed in slots 1 through
5 of an I/O adapter module (IOAM) (except in Integrity NonStop NS14000 and NS1000 systems,
where slot 1 is reserved for a “4-Port ServerNet Extender (4PSE)”). There are two IOAMs in an
IOAM enclosure, so a total of 10 G4SAs can be installed in an enclosure. Although the G4SA
supersedes the Ethernet 4 ServerNet adapter (E4SA), Fast Ethernet ServerNet adapter (FESA),
and the Gigabit Ethernet ServerNet adapter (GESA), it cannot be installed in a NonStop S-series
enclosure.
A G4SA has three primary system connections:
• Data transfer interface (ServerNet)
• Maintenance entity (ME) interface
• Power interface
The data transfer interface consists of ports to the ServerNet X and Y fabrics. The ports connect
to the ServerNet addressable controller (SAC) on the adapter. If one ServerNet fabric fails, the
G4SA can still be accessed using the remaining fabric.
The Maintenance Entity (ME) interface contains the circuitry required to meet the maintenance
system requirements of an active-logic adapter.
The G4SA receives power through a shielded, high-density, metric connector module. The
connector module provides attachments to the two ServerNet fabrics.
G4SAs are configured and managed through the Subsystem Control Facility (SCF) interface to
the ServerNet LAN Systems Access (SLSA) subsystem. The SLSA subsystem is preinstalled and
preconfigured and is started during the system-load sequence.
For information about the SLSA subsystem, refer to the LAN Configuration and Management
Manual.
4-Port ServerNet Extender (4PSE)
A component in Integrity NonStop NS14000 and NS1000 systems only, 4PSEs provide ServerNet
connectivity between processors and the IOAM enclosure (functionality provided by p-switches
in an Integrity NonStop NS16000 series system). 4PSEs are located in slot one (and optionally
slot 2) of each IOAM. They are connected to the processors through LSUs in Integrity NonStop
NS14000 systems, directly to the processors (with no LSUs) in Integrity NonStop NS1000 systems.
FCSAs and G4SAs can be installed in slots 2 through 5 of the two IOAMs in the IOAM enclosure
for communications to storage devices and subsystems as well as to LANs.
See “Monitoring the 4PSEs” (page 101).
98 I/O Adapters and Modules: Monitoring and Recovery