IBM TS4300 3555, User Manual

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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.
GUI
Graphical User Interface
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.
HH
Half Height.
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 Security Key Lifecycle Manager (SKLM)
IBM's EKM application that assists encrypting tape drives in generating, protecting, storing, and
maintaining encryption keys that encrypt information that is written to and decrypt information that is
read from tape media.
IBM Spectrum Archive
Formerly known as Linear Tape File System (LTFS). A file system that works with LTO Generation tape
technology to access data stored on an IBM tape cartridge.
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
214 IBM TS4300 Tape Library Machine Type 3555: User's Guide