Bull ESCALA E Series Operator's Manual - page 52
G-2
Operator’s Guide
H
high availability:
Continuous availability of system
resources due to their redundant configuration.
hot swapping:
The operation of removing a faulty
hard disk drive and replacing it with a good one
without interrupting the system activity.
I
ID:
A number which uniquely identifies a device on
a bus.
I/O:
Input /Output.
IPL:
Initial Program Load
.
It defines the firmware
functional phases during the system initialization.
ISA:
Industry Standard Architecture.
J
JBOD:
Just a Bunch Of Disks.
K
Key Mode Switch:
Key controlled switch which
controls the system operation mode.
KP2:
The back plane of a disk cage that connects
two hard disk drives with 1.6 inch form factor.
KP3:
The back plane of a disk cage that connects
three hard disk drives with 1 inch form factor.
L
LAN:
Local Area Network.
LED:
Light-Emitting Diode. On the disk expansion
unit operator panel, it indicates the power on status.
M
media and disk device areas:
Areas which house
the media drives and the hard disk drives.
memory bank:
The minimum quantity of memory
used by the system. It physically consists of two
memory DIMM’s. See also DIMM and riser.
multimedia:
Information presented through more
than one type of media. On computer systems, this
media includes sound, graphics, animation and text.
multitasking:
The ability to perform several tasks
simultaneously. Multitasking allows you to run
multiple applications at the same time and
exchange information among them.
N
NVRAM:
Non Volatile Random Access Memory.
O
OF:
Open Firmware. See Open Firmware.
OP:
Operator Panel. See Operator Panel.
Open Firmware:
An architecture for the firmware
that controls a computer before the Operating
System execution. It also provides a user-interface.
Operating System:
The software which manages
the computer’s resources and provides the
operating environment for application programs.
Operator Panel:
The system panel where the
3-Digit Hexadecimal Display and Key Mode Switch
are located.
P
PCI:
Peripheral Component Interconnect.
A bus
architecture that supports high-performance
peripherals such as graphic boards, multimedia
video cards and high-speed network adapters.
POST:
Power On Self Test.
PowerPC:
A standard RISC microprocessor
family.
Q
QIC:
Quarter-Inch Cartridge.
R
RAID:
Redundant Array of Inexpensive Disks. A
method of combining hard disk drives into one
logical storage unit which offers disk-fault tolerance.
riser:
A card which can host up to eight memory
DIMM’s. It is used to expand the system memory
storage.
ROM:
Read-Only Memory.