IBM Ultrium Gen 6 Installation And User Manual page 107

drive has a native storage capacity of up
to 400 GB per cartridge and a native
sustained data transfer rate of 135 MB per
second.
Generation 4
The informal name for the
fourth-generation version of the IBM
Ultrium Tape Drive. The Generation 4
drive has a native storage capacity of up
to 800 GB per cartridge and a native
sustained data transfer rate of 135 MB per
second.
Generation 5
The informal name for the fifth-generation
version of the IBM Ultrium Tape Drive.
The Generation 5 drive has a native
storage capacity of up to 1500 GB per
cartridge and a native sustained data
transfer rate of 140 MB per second.
Generation 6
The informal name for the
sixth-generation version of the IBM
Ultrium Tape Drive. The Generation 6
drive has a native storage capacity of up
to 2500 GB per cartridge and a native
sustained data transfer rate of 160 MB per
second.
gigabit (Gbit)
1 000 000 000 bits.
gigabyte (GB)
1 000 000 000 bytes.
Gigabit Interface Converter (GBIC)
Converts copper interface to optic
interface.
gnd Ground.
H
hertz (Hz)
Unit of frequency. One hertz equals one
cycle per second.
hex Hexadecimal.
High Voltage Differential (HVD)
A logic signaling system that enables data
communication between a supported host
and the library. HVD signaling uses a
paired plus and minus signal level to
reduce the effects of noise on the SCSI
bus. Any noise injected into the signal is
present in both a plus and minus state,
and is thereby canceled. Synonymous
with differential.
HVD SCSI Bus High Voltage Differential
Hz Hertz (cycles per second).
I
IBM Ultrium Tape Drive
Located within the library, a data-storage
device that controls the movement of the
magnetic tape in an IBM LTO Ultrium
Tape Cartridge. The drive houses the
mechanism (drive head) that reads and
writes data to the tape.
ID Identifier.
identifier (ID)
(1) In programming languages, a lexical
unit that names a language object; for
example, the names of variables, arrays,
records, labels, or procedures. An
identifier usually consists of a letter
optionally followed by letters, digits, or
other characters. (2) One or more
characters used to identify or name data
element and possibly to indicate certain
properties of that data element. (3) A
sequence of bits or characters that
identifies a program, device, or system to
another program, device, or system.
IML Initial microprogram load.
initial microprogram load (IML)
The action of loading a microprogram
from an external storage to writable
control storage.
initiator
The component that executes a command.
The initiator can be the host system or the
tape control unit.
Installation.
INST
interface
A shared boundary. An interface might be
a hardware component to link two
devices or it might be a portion of storage
or registers accessed by two or more
computer programs.
interposer
The part used to convert a 68-pin
connector to a 50-pin D-shell connector.
intervention required
Manual action is needed.
INTRO
Introduction.
89
Glossary