StorageTek L700 Service Manual page 343

drive (1) A device for moving magnetic tape
and controlling its movement. (IBM) (2) A
device for moving tape and controlling its
movement. (T) (3) A device that moves
magnetic tape and includes the mechanisms
for reading and writing data on the tape. (3)
An electromechanical device that moves
magnetic tape and includes the mechanisms
for writing and reading data to and from the
tape. See also tape drive.
Dynamic Host Configuration Protocol
(DHCP) (1) Server software that
automatically sets the library IP address,
subnet mask, and name. (2) Server software
that automatically sets IP address, net mask,
and gateway. (IBM)
Dynamic Worldwide Name (dWWN) A
feature that applies dynamic names to
network devices rather than fixed names.
When a dWWN-named devices is replaced, it
is assigned the same WWN as the one it
replaced, preventing re-configuration of the
network.
E
electronically erasable programmable
read-only memory (EEPROM) A
nonvolatile sequential access memory device
that can be written onto when a change of
contents is required.
electrostatic discharge (ESD) An
undesirable discharge of an accumulated
electrical charge (static) that can severely
damage delicate components and degrade
electrical circuitry.
Enterprise Systems Connection
(ESCON) (1) An IBM-patented set of
products and services that provide a
dynamically connected environment, over
fiber-optic cable, within a mainframe or client
server enterprise. (2) A set of IBM products
and services that provide a dynamically-
connected environment within an enterprise.
(IBM).
95846
Ethernet (1) A local area network (LAN)
architecture developed by Xerox
Corporation. The Ethernet specification
served as the basis for the IEEE 802.3
standard, which is one of the most widely
implemented LAN standards. (2) A 10 Mb/s
baseband local area network that allows
multiple stations to access the transmission
medium at will without prior coordination,
avoids contention by using carrier sense and
deference, and resolves contention by using
collision detection and transmission. Ethernet
uses carrier sense multiple access with
collision detection. (IBM) (3) A trademark for
a local area network (LAN) protocol. (4) A
type of networking technology for local area
networks that uses coaxial cable to carry
signals between computers at a rate of 10
Mb/s.
Ethernet address A six-byte address that
makes a library accessible to a network. See
also Ethernet, Internet Protocol (IP) address,
library name, and subnet mask.
event examination A file, accessible
through the operator panel, that contains
events that occurred during the functional
operation of the tape library.
F
Fabric (1) The Fibre Channel topology
similar to a telephone switch in that the
initiator of a call to the receiving port simply
provides the receiver with the port address,
and the fabric routes the transmission to the
correct port. A fabric differs from a point-to-
point or arbitrated loop topology in that it
provides for interconnections between ports
without having a point-to-point connection.
The fabric also serves as a media-type
converter. (2) The hardware that connects
workstations and servers to storage devices
in a SAN. A fabric enables any-server-to-any-
storage device connectivity using a Fibre
Channel switch.
Fabric login The process by which a Fibre
Fourteenth Edition
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Glossary
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