Glossary
Quantum SuperLoader 3A Series User’s Guide
98
M
MAM
Medium Auxiliary Memory (MAM) is an SDLT 600A tape drive
feature that provides information on the status and prior use
history of a Super DLTtape cartridge.
MB
Megabyte. A unit of measurement equal to 1 million or 10
6
bytes.
media
The material or device used to store information in a storage
subsystem, such as a tape or disk drive. DLTtape media is a high-
grade metal particle (MP) formulation that takes advantage of the
latest advances in binder chemistry. By combining both solid and
liquid lubricants in the tape binder system, tape and head wear
are reduced while repelling airborne particles that could affect
read/write head performance. In addition, by using a uniform
particle shape, a dense binding system, a smooth coating surface,
and a specially selected base file, Quantum DLTtape half-inch
cartridge tapes take advantage of shorter wavelength recording
schemes to ensure read compatibility with future generations of
DLT drives.
MCBF
Mean Cycles Between Failures. This is average cycle count
between possible failures. A cycle is the movement of a cartridge
from the tape drive to a magazine slot and the selection of
another cartridge and moving that cartridge back to the drive.
MHz
MegaHertz. A measurement of frequency in millions of cycles
per second.
microsecond (
μ
s)
One millionth of a second (.000001 sec.).
millisecond (ms)
One thousandth of a second (.001 sec.).
MTTR
Mean Time to Repair. The average time it takes to repair a drive
that has failed for some reason. This only takes into consideration
the changing of the major subassemblies such as the printed
circuit board or sealed housing. Component-level repair is not
included in this number as this type of repair cannot be
performed in the field.
MTBF
Mean Time Between Failures. Reliability rating indicating the
expected failure rate of a product in power on hours (POH).
MXF
Material eXchange Format, is a file format designed to improve
data and metadata exchange. The targeted objective is the inter
operability between content creation mainframes, work stations
and peripherals.
This wrapper file format was designed to make use of current
and forthcoming data formats. It also permits conveyance of