Quantum SuperLoader 3A Series User Manual page 112

M
Quantum SuperLoader 3A Series User's Guide
Medium Auxiliary Memory (MAM) is an SDLT 600A tape drive
MAM
feature that provides information on the status and prior use
history of a Super DLTtape cartridge.
Megabyte. A unit of measurement equal to 1 million or 10
MB
The material or device used to store information in a storage
media
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.
Mean Cycles Between Failures. This is average cycle count
MCBF
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.
MegaHertz. A measurement of frequency in millions of cycles
MHz
per second.
One millionth of a second (.000001 sec.).
microsecond (μs)
One thousandth of a second (.001 sec.).
millisecond (ms)
Mean Time to Repair. The average time it takes to repair a drive
MTTR
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.
Mean Time Between Failures. Reliability rating indicating the
MTBF
expected failure rate of a product in power on hours (POH).
Material eXchange Format, is a file format designed to improve
MXF
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
Glossary
6
bytes.
98