IBM System Storage TS3500, Введение и руководство по планированию

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cartridge accessor to park itself and
provide clear access to the library's
interior when you power-off the library or
open the front door. The Pause key
enables quick recovery when you power
on the library or close the front door.
PB Petabyte.
PDF See Portable Document Format .
Petabyte
1
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000
v
000
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000
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000 bytes.
ping
(1) A command that calls an IP address.
(2) The act of issuing a command that
calls an IP address.
pivot assembly
On the cartridge accessor of the TS3500
Tape Library, a group of parts that
provides a mounting platform for the
gripper mechanism and the bar code
reader. The pivot assembly is capable of
180° rotation about the vertical axis.
point load
On a floor, one or more locations where
the weight of an object is concentrated.
point-to-point topology
In communications, the physical or logical
arrangement of nodes in a network to
facilitate data transmission between two
locations without the use of any
intermediate display station or computer.
port (1) A system or network access point for
data entry or exit.
(2) A connector on a device to which
cables for other devices such as display
stations and printers are attached.
(3) The representation of a physical
connection to the link hardware. A port is
sometimes referred to as an adapter;
however, there can be more than one port
on an adapter.
Portable Document Format (PDF)
A standard specified by Adobe Systems,
Incorporated, for the electronic
distribution of documents. PDF files are
compact, can be distributed globally (via
e-mail, the Web, intranets, or CD-ROM),
and can be viewed with the Acrobat
Reader, which is software from Adobe
Systems that can be downloaded at no
cost from the Adobe Systems home page.
power cord
A cable that connects a device to a source
of electrical power.
power cord plug
On a power cord, the male fitting for
making an electrical connection to a
circuit by insertion into a receptacle.
power distribution unit (PDU)
A unit that provides AC distribution
within a TS3500 Tape Library frame by
supplying multiple internal AC outlets
from a single external AC line cord.
power off, powered off
(1) To remove electrical power from a
device.
(2) The state of a device when power has
been removed from it.
power on, powered on
(1) To apply electrical power to a device.
(2) The state of a device when power has
been applied to it.
power-on indicator
Located beside the library power switch
on the operator panel, a green light that,
when lit, indicates that DC power is
available within the TS3500 Tape Library.
power receptacle
The mounted female electrical fitting that
contains the live parts of the circuit.
power supply
The electrical component of a computer
system that converts standard AC current
to the lower voltage DC current used by
the computer. The amount of current a
power supply can provide is rated in
amperes.
power switch
See library power switch .
prestage
The movement of a cartridge between
cartridge cache and an HD slot. See also
destage .
protocol
The meanings of, and the sequencing
rules for, requests and responses used for
managing a network, transferring data,
and synchronizing the states of network
components.
put Pertaining to the TS3500 Tape Library, to
Glossary
247