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

Glossary
device class
Glossary
237
customers to move applications and data to the 900
Series HP 3000 system without changes or
recompilation.
configuration 1) The way in which computer and
peripheral devices are programmed to interact with
each other. 2) The layout of the computer system,
including MPE table, memory, and buffer sizes. The
configuration tells which peripheral devices are
connected to the computer and how they can be
accessed.
connect time The amount of time, in minutes, that
a user, group, or account has used the CPU for a
session or job. It can be displayed by executing the
MPE REPORT command.
console A terminal given unique status by the
operating system. The operator uses the console to
monitor and manage jobs, sessions and resources,
respond to requests, and communicate with other
user terminals. It is used to boot the system and
receive system loader error messages, system error
messages, and system status messages.
console boot path The path used to determine if
the system can autoboot without operator
intervention.
console command A command that is executable
only from the system console at the = prompt
(generated by pressing
CTRL and the A key at the
console keyboard). Console commands cannot be
entered by other users because
CTRL A has no
meaning on a standard terminal. The logical console,
however, can be moved to a standard terminal.
console logging A system logging event. It records
console commands in the system log file.
continuation character An ampersand (&)
character entered as the last character of a
command line. A continuation character tells the
command interpreter that the command is longer
than one line and is continuing onto a second or
more subsequent lines.
control-Y A break function activated by
simultaneously pressing the
CTRL key and the Y key
on a terminal’s keyboard. It is typically a subsystem
break and does not affect MPE commands. In
documentation this two-key sequence is shown as
CTRL Y.
CPU time The amount of time, in seconds, that a
user, group, or account has used the CPU. It can be
displayed by executing the MPE REPORT command.
crash 1) The unexpected shutdown of a program or
system. If the operating system crashes, it is called a
system crash, and requires the system to be
rebooted. 2) A head crash or disk crash. This occurs
when the read/write heads on a disk drive (that
normally ride on a thin cushion of air above the disk)
make physical contact with the disk surface,
destroying data and the disk track. The extent of
damage to the system depends on which disk was
involved and how much of the disk was corrupted. A
crash of the system disk is serious, since it contains
the directory of user files as well as operating system
programs, the I/O configuration, and the account
structure.
create volumes capability (CV Capability) The
ability to define and access non system domain disks
with the NEWSET command (private volumes with the
NEWVSET command for MPE V/E). Users and
accounts assigned CV capability are automatically
given use volumes (UV) capability.
cumulative backup A backup strategy where a
full backup is done once a week and partial backups
on all other work days.
data communications The transmission of
information from one computer or terminal to
another. It is sometimes shortened to datacom.
data communications and terminal
subsystems The methodology used to connect all
asynchronous devices to a 900 Series HP 3000,
except for the system console.
default A predefined value or condition that is
assumed, and used by the operating system if no
other value or condition is specified.
device adapter A device that manages
communications between the computer and a
peripheral device. It is the same as an I/O interface
card.
device class A collection of devices that have some
user-defined relation. The file system supports a
means of maintaining collections of devices but is
cognizant of the relation only for certain device class
names.