IBM TS2900 Setup, Operator, And Service Manual page 270

Gigabit Interface Converter (GBIC)
Converts copper interface to optic interface.
gnd Ground.
H
HBA Host Bus Adapter.
HD Slot Technology
High-density (HD) slot technology. Allows multiple cartridges to be stored in a tiered
architecture.
hertz (Hz)
Unit of frequency. 1 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 that is injected into the signal is present in both a plus and minus state,
and is 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 that are 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.
IEC International Electrotechnical Commission.
IKE Internet Key Exchange that is used in the IPsec protocol.
IML Initial microprogram load.
incompatible magazine
This message might display on the Operator Panel during library initialization. It occurs during
factory restore or VPD. This message is not a real issue since it takes time for the library to
configure.
initial microprogram load (IML)
The action of loading a microprogram from an external storage to writable control storage.
initiator
The component that runs a command. The initiator can be the host system or the tape control
unit.
INST Installation.
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IBM TS2900 Tape Autoloader: Setup, Operator, and Service Guide Machine Type 3572