System Startup, Configuration, and Shutdown Reference Manual (32650-90907)

Glossary
backup
Glossary
236236
backup The process that duplicates computer data
to offline media, such as magnetic tape. Backups
protect data if a system problem should occur.
batch access capability (BA Capability) A
default capability assigned to accounts and users
that allows users to submit batch jobs.
battery backup unit A box within the SPU that
contains a battery to supply power to main memory
during a power failure.
boot The process of loading, initializing, and
running an operating system.
boot path The pointers to the set of files that are
used to bring up the system from disk or tape. The
primary boot path is used for booting the system
from disk resident software. The alternate boot path
is used for booting the system from a boot tape. The
console boot path is used to determine if the system
can autoboot without operator intervention.
boot tape A tape created by backing up the system
configuration with the system generator (SYSGEN)
utility program that is used to reload the system
configuration. Also referred to as a system load tape.
Equivalent to MPE V/E coldload tape.
capability A method for determining what
commands account members are allowed to execute.
Capabilities are assigned to accounts, groups, and
users to provide system security and access to the
operating system. Account capabilities are assigned
by the system manager when the account is created.
The account manager then assigns capabilities to
groups and users within the account.
channel A path within a data communications line
through which data flows.
channel I/O (CIO) Input/output instructions for a
channel.
channel I/O adapter A device that provides the
interface between the central bus (CTB) and the
channel I/O buses. Each channel I/O adapter serves
as a high performance channel multiplexer
providing a full direct memory access (DMA) for all
HP-IB and LAN I/O channels and synchronizing the
differing speeds and bandwidths of the CTB and
channel I/O buses.
channel I/O bus (CIB) A device that provides a
synchronous bi-directional data path between the
central bus (CTB) and I/O devices.
channel number The number assigned to the
device controller board in the I/O card cage. It is
used to calculate the logical address of the device, or
device reference table (DRT) number.
CIO adapter (CA) The interface slot number
containing the adapter for the CIO Bus and central
bus (CTB).
CIO expander The channel input and output
expander that provides eight additional peripheral
card slots to the SPU.
class A user-defined collection of objects.
class name 1) A label that is either unique to, or
associated with, one or more devices in the system’s
I/O configuration, used to reference a particular
device or class of devices. Device class names may be
up to eight alphanumeric characters long, beginning
with a letter. A single logical device can have
multiple device classnames. The HP 2680 laser
printer, for example, is referred to as EPOC
(electrophotographic output for computers), PP
(page printer), or SLP (system line printer). Directing
output to any of these class names sends the output
to a laser printer. 2) An abstract entity that can own
objects in an HP SQL DBEnvironment. 3) A set of
one or more SQL or ISQL commands in a file that
can be executed with the ISQL START command.
command interpreter (CI) A program that reads
command lines entered at the standard input device,
interprets them, determines if they are valid, and if
so, executes them.
communication link The software and hardware
that moves data from the driver and card of one
computer to the driver of an adjacent computer.
compatibility The ability of software developed for
one computer to work on another computer. See
compatibility mode.
compatibility mode (CM) A method of providing
object code compatibility between MPE V/E-based
systems and the 900 Series HP 3000 system.
Compatibility mode allows current Hewlett-Packard