NonStop S-Series Server Description Manual (G06.24+)

Glossary
HP NonStop S-Series Server Description Manual—520331-003
Glossary-90
ServerNet device
ServerNet device. Interface logic that is associated with a specific hardware unit, such as a
processor or I/O adapter, and that provides the interface to the ServerNet
communications network. The responsibilities of the ServerNet device are to transform
message data into ServerNet packets, to transmit those packets, to receive ServerNet
packets, and to unpack the data on behalf of the associated hardware unit. See also
ServerNet subdevice.
ServerNet device adapter (ServerNet/DA). A ServerNet adapter that controls external
devices. The 6760 ServerNet/DA contains up to four ServerNet addressable
controllers (SACs), each of which can control either disk drives or tape drives.
ServerNet device ID. See ServerNet ID.
ServerNet diagram. A graphical layout of the logical connections between objects in the
system. These objects can include processors, ServerNet routers, ServerNet adapters,
disks on the SCSI bus, and so on.
ServerNet dump. To copy the memory of a processor to disk by using the ServerNet
fabrics.
ServerNet end device. See ServerNet device.
ServerNet expansion board (SEB). (1) A connector board that plugs in to the backplane to
allow one or more ServerNet cables to exit the rear of the enclosure. The SEBs and
ServerNet cables allow processors in one group to communicate with processors in
another group. Each SEB provides either the ServerNet X fabric or the ServerNet Y
fabric for a group. (2) A collective term for both SEBs and modular SEBs (MSEBs)
when a distinction between the two types of SEBs is not required.
ServerNet extender module (SEM). Equipment that increases the distance that ServerNet
signals can be transmitted over fiber-optic cables to 40 kilometers. If multimode
fiber-optic (MMF) and single-mode fiber-optic (SMF) ServerNet cables are used in the
same system, the SEM converts MMF signals so that they can be transmitted by SMF
ServerNet cables and converts SMF signals so that they can be transmitted by MMF
ServerNet cables.
ServerNet/FX adapter. A ServerNet adapter that logically extends the ServerNet X and Y
fabrics to other clusters in a Fiber Optic Extension (FOX) ring by using fiber-optic lines.
Two 6740 ServerNet/FX adapters are used, one for the X ring and one for the Y ring.
ServerNet/FX 2 adapter. A ServerNet adapter that logically extends the ServerNet X and Y
fabrics to other clusters in a Fiber Optic Extension (FOX) ring by using fiber-optic lines.
Two 6742 ServerNet/FX 2 adapters are used, one for the X ring and one for the Y ring.
ServerNet ID. A unique identifier for an addressable unit on a ServerNet communications
network. A unit can have multiple ServerNet node IDs. This ID is used for routing: each
packet has a source ServerNet node ID and a destination ServerNet node ID. Note
that a pair of processors operating in duplex mode share one ServerNet node ID.