NonStop System Glossary

MSEB port
A connector on modular ServerNet expansion boards (MSEBs) used for ServerNet links. An MSEB
has four fixed serial-copper ports and six plug-in card (PIC) slots that accept a variety of connection
media. See also SEB port.
MSGMON
See message monitor process (MSGMON).
MSIO
Modular storage I/O.
MSP
See master service processor (MSP).
multifunction I/O board (MFIOB)
A ServerNet adapter that contains ServerNet addressable controllers (SACs) for SCSI and Ethernet;
a service processor; ServerNet links to the processor, to the two ServerNet adapter slots, and to
one of the ServerNet expansion board (SEB) slots; and connections to the serial maintenance bus
(SMB), which connects components within an enclosure to the service processor.
multilane link
A communication link that can carry multiple ServerNet packets in parallel along either direction.
A multilane link can be implemented through separate ServerNet fiber optic cables, separate fiber
optic pairs within a multi-pair fiber optic cable, or separate packet-carrying copper vias in hardware
modules such as processor switches in HP Integrity NonStop NS-series, ServerNet switches in HP
Integrity NonStop BladeSystems, and other products. Two-lane links and four-lane links between
NonStop Cluster Switches or between nodes in a BladeCluster Solution are examples of multilane
links.
multimode fiber-optic (MMF) plug-in card (PIC)
A plug-in card (PIC) that supports the multimode fiber-optic (MMF) interface.
multimode fiber-optic (MMF) ServerNet cable
A fiber-optic cable that either allows more than one mode to propagate or supports propagation
of more than one mode of a given wavelength. MMF ServerNet cable typically supports shorter
transmission distances than single-mode fiber-optic (SMF) ServerNet cable.
multiplexed
The action of separating data traffic from one line onto several distinct lines or of combining data
traffic from several distinct lines onto one line.
mutex
See mutual exclusion (mutex).
mutual exclusion (mutex)
An operating mode with interrupts disabled.
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