ServerNet Cluster 6780 Operations Guide (G06.28+, H06.05+)

Glossary
ServerNet Cluster 6780 Operations Guide—525606-003
Glossary-2
boot
enclosure, one I/O enclosure, or one processor enclosure with one or more I/O
enclosures attached.
boot. A synonym for load. Load is the preferred term used in this and other NonStop S-
series system manuals. See load.
cable channel. A cable management conduit that protects the cables that run between two
system enclosures in a double-high stack. Each system enclosure has two cable
channels running vertically on its service side: one on the left-hand side of the
enclosure, and one on the right-hand side of the enclosure.
cable guidepost. A cable management rod that routes cables exiting the upper enclosure
in a double-high stack to prevent the cables from hanging down in front of the
customer-replaceable units (CRUs) in the base enclosure. A cable guidepost extends
from the base of each cable channel.
cable support. A piece of cable management hardware that secures system cables. The
cable support attaches to the service side of a system enclosure near the bottom of the
enclosure. Cable ties for securing system cables are threaded through the cable
support. The cable support also contains the group and module ID labels and the rear
group service light-emitting diode (LED).
card cage. A structure made up of slots that hold components such as
customer-replaceable units (CRUs) and ServerNet adapters.
carrier. (1) A sheet-metal structure that allows a single-high ServerNet adapter to be
installed in a ServerNet adapter slot designed for a double-high ServerNet adapter.
(2) An electrical signal that carries data.
CE. Customer engineer. See service provider.
central processing unit (CPU). Historically, the main data processing unit of a computer. A
NonStop S-series system has multiple cooperating processors rather than a single
CPU. See also processor
.
channel. An information route for data transmission. See also ServerNet link
.
checksum. A generic term, meaning to “add” together (although the definition of add need
not be a normal arithmetic add) all of the data to produce a check word. See also cyclic
redundancy check (CRC).
CIIN. A command file in the SYSnn subvolume that is read and executed by the startup
TACL process after system load if the CIIN file is specified in the CONFTEXT file.
client. A software process, hardware device, or combination of the two that requests
services from a server. Often, the client is a process residing on a programmable
workstation and is the part of an application that provides the user interface. The
workstation client might also perform other portions of the application logic.