Glossary
Quantum SuperLoader 3A Series User’s Guide
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formatted capacity
The amount of room left to store data on a tape after
writing the sector headers, boundary definitions, and timing
information during a format operation.
FTP
File Transfer Protocol. A protocol used to transfer files over a
TCP/IP network.
full height
Dimensions of a drive that meet standard height
requirements, usually 3.25 inches (82.55 mm) for a tape or disk
drive product.
G
GB
Gigabyte. A unit of measurement equal to 1 million kilobytes.
GHz
Gigahertz. A measurement of frequency that equals one
thousand million Hz, or one thousand MHz. Speeds for
computer microprocessors, buses, and interfaces are often
measured in GHz.
GS
German Safety.
H
half height
Standard drive size equivalent to half the vertical space of a
5.25 inch (133.35 mm) drive.
hard error
A data error that persists when the tape is reread, usually
caused by defects in the physical surface.
Hierarchical Storage Management (HSM)
A method of storing massive
amounts of data in tape libraries that allows for easy and rapid
recall of the material. Due to the lowering cost of disk drives,
HSM has yet to reach its full potential.
HiFN
An ASIC (Application Specific Integrated Circuit) for the SDLT
that handles data compression.
HIM
The Host Interface Module implements the interface between the
host system and the tape drive.
HRE
Hard Read Error.
HTTP
HyperText Transfer Protocol - The protocol for moving
hypertext files across the Internet. Requires an HTTP client
program on one end, and an HTTP server program on the other
end. HTTP is the most used protocol on the Internet.
HWE
Hard Write Error.
Hz
Hertz. A unit of frequency measurement that equals 1 cycle per
second. Computers and electronic devices are often measured in