NonStop System Glossary

single-mode fiber-optic (SMF) ServerNet cable
A fiber-optic cable that allows only one mode to propagate. An SMF ServerNet cable has a
small-diameter core for optimized long-distance transmission. See also multimode fiber-optic (MMF)
ServerNet cable.
single-modular redundancy (SMR)
See simplex.
single-wide plug-in card (PIC)
A small-form-factor plug-in card (PIC) that occupies one PIC slot within a ServerNet adapter or a
NonStop cluster switch. See also double-wide plug-in card (PIC).
sinusoidal
A waveform that can be mathematically expressed by the sine function.
SIT
See system image tape (SIT).
site update tape (SUT)
One or more tapes or DVDs that contain each target system’s site-specific subvolume and various
products. Each product contains a softdoc and a complete set of files. A SUT is delivered with
every new NonStop system and can be ordered whenever a new release version update (RVU) of
the system software is available. A full SUT contains the current RVU of the NonStop operating
system and all product software that has been ordered with it. A partial SUT contains a subset of
products for the current RVU.
SIV
See system interrupt vector (SIV).
skin effect
The tendency of higher frequency signals to flow on the outside surface, or skin, of a conductor
instead of through the entire cross-section of the conductor. The result is less total conductor area
available for carrying current and an increase in the resistance of the conductor at that high signal
frequency.
slave interface
A physical interface that is part of a bonded interface.
slice
See HP NonStop Blade Element (NSBE).
slot
1. A physical, labeled space for a customer-replaceable unit (CRU) or field-replaceable unit (FRU)
that is part of an enclosure or another CRU or FRU.
2. Part of the group, module, and slot naming convention for uniquely identifying the logical location
of a component within a system. A slot is a subset of a module.
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