Users Guide

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
ID
Identier.
identier (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 identier 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 identies 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 congure.
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.
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.
Internet Protocol Version 4 (IPv4)
See IPv4.
Internet Protocol Version 6 (IPv6)
See IPv6.
interposer
The part that is used to convert a 68-pin connector to a 50-pin D-shell connector.
intervention required
Manual action is needed.
Glossary
161