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Quantum A-Series Tape Drives User’s Guide 84
G
GB
Gigabyte
SI — 1,000,000,000 bytes or 10
9
. This is the International System
of Units (SI) definition commonly used by telecommunications
and storage manufacturers.
GiB — 1,073,741,824 bytes, equal to 1024
3
, or 2
30
. This is the
definition often used in computer science, computer
programming, and in the majority of computer operating
systems documentation. This measurement can be abbreviated as
GiB (gibibyte) to avoid ambiguity, as defined in IEC 60027-2.
Note: For the purpose of this document, SI is used.
GS German Safety.
H
Head
The tiny electromagnetic coil and metal pole used to create and
read back the magnetic patterns on the media. Also known as the
read/write head.
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 a 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.
I
ICM
The Integrated Controller Module contains the main controller
and servo microprocessor, the custom-designed SDLT ASICs,
and the cache memory.
IEC The International Electrotechnical Commission is a standards
organization that prepares and publishes international standards
for all electrical, electronic, and related technologies.
IEEE Institute of Electrical and Electronics Engineers
Interface A hardware or software protocol—contained in the electronics
of the media controller and tape drive—that manages the
exchange of data between the tape drive and computer.
IP Internet Protocol.