thin rods of glass or some other
transparent material of high refractive
index.
FICON/ESCON-enabled products
Any of the IBM tape products that are
equipped with Fibre Channel (FICON) or
Enterprise System Connection (ESCON)
interfaces to allow attachment to the
System z
®
server (mainframe host).
field replaceable unit (FRU)
Any piece of hardware that is complete,
contained, and manufactured or
assembled as a whole unit and can be
replaced in the field by a customer
engineer (CE).
file A named set of records that are stored or
processed as a unit.
file transfer protocol (FTP)
In the Internet suite of protocols, an
application layer protocol that uses TCP
and Telnet services to transfer bulk-data
files between machines or hosts.
firmware
Proprietary code that is delivered as part
of an operating system. Firmware is more
efficient than software loaded from an
alterable medium and is more adaptable
to change than pure hardware circuitry.
An example of firmware is the Basic
Input/Output System (BIOS) in read-only
memory (ROM) on a PC motherboard.
floating home cell
The concept of actively managing
cartridge placement by picking an optimal
new home for cartridges that are being
demounted. HD libraries use a floating
home cell approach for the entire library.
frame In Fibre Channel technology, a unit of
transmission that includes delimiters,
control characters, information, and
checking characters.
See library frame.
frame control assembly (FCA)
The assembly consists of one Library
Control Card (LCC), internal library
communication cables, and two 12 V
power supplies.
front door
At the front of each frame in the TS4500
tape library, the swinging barrier by
which entry is closed or opened to the
frame.
FRU See field replaceable unit.
FTP See file transfer protocol.
FTP site
Any electronic repository of information
that uses the File Transfer Protocol (FTP)
for transferring files to and from servers.
Use of an FTP site requires a user ID and
possibly a password.
full capacity expansion
A feature that increases the initial capacity
of the TS3500 tape library models.
full duplex
Simultaneous transmission and reception
of data between two nodes of a network.
G
GB See gigabyte.
Gb See gigabit.
Gbps Gigabits per second. One gigabit equals
1 000 000 000 bits.
get (1) In library operation, the act of a
cartridge gripper that is retrieving a tape
cartridge from a storage slot, drive, or
I/O station.
(2) In Simple Network Management
Protocol (SNMP), a request for
information about the library that the
operator issues through a monitoring
server and is transmitted by SNMP.
get-response
The information that is provided in
response to an SNMP get request.
GiB One gibibyte (GiB) = 1,073,741,824 bytes.
gigabit (Gb)
1 000 000 000 bits.
gigabyte (GB)
1 000 000 000 bytes.
H
HA See high availability.
HACMP
See High Availability Clustered
Multiprocessing.
HBA See host bus adapter.
Glossary 175
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