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magnetic tape
A tape with a magnetical surface layer on which data can be stored by
magnetic recording.
MAP
Maintenance analysis procedure.
mask
A pattern of characters that controls the retention or elimination of portions
of another pattern of characters. To use a pattern of characters to control
the retention or elimination of portions of another pattern of characters.
master file
A file used as an authority in a given job and that is relatively permanent,
even though its contents may change. Synonymous with main file.
MB
Mega Byte (usually expressed as data rate in MB/s or MB/second).
media capacity
The amount of data that can be contained on a storage medium, expressed
in bytes of data.
media-type identifier
Pertaining to the bar code on the bar code label of the IBM Ultrium Tape
Cartridge, a 2-character code, L1, that represents information about the
cartridge.
L
identifies the cartridge as one that can be read by devices
which incorporate LTO technology;
1
indicates that it is the first generation
of its type.
mega
One million of.
meter
In the Metric System, the basic unit of length; equal to approximately 39.37
inches.
micro
One millionth of.
microcode
(1) One or more micro instructions. (2) A code, representing the
instructions of an instruction set, implemented in a part of storage that is
not program-addressable. (3) To design, write, and test one or more micro
instructions. (4) See also
microprogram
.
microdiagnostic routine
A program that runs under the control of a supervisor, usually to identify
field replaceable units.
microdiagnostic utility
A program that is run by the customer engineer to test the machine.
microinstruction
A basic or elementary machine instruction.
microprogram
A group of microinstructions that when executed performs a preplanned
function.
The term microprogram represents a dynamic arrangement or selection of
one or more groups of microinstructions for execution to perform a
particular function. The term microcode represents microinstructions used
in a product as an alternative to hard-wired circuitry to implement certain
functions of a processor or other system component.
MIM
Media information message.
mm
Millimeter.
Glossary
G-9
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Страница 105: ...A67E0037 1 6 2 3 4 5 Figure D 8 Attaching the leader pin to the tape Appendix D Repairing a Cartridge D 7...
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Страница 148: ...Part Number 46C2120 Printed in USA GC27 2275 02 1P P N 46C2120...