Quantum PowerStor L200, User Manual

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Glossary
90 Quantum|ATL PowerStor L200 Series Library User’s Guide
M
MB
Megabyte—A standard unit of measure for computer
memory equal to 1,024 kilobytes. For example, 16 MB is equal to
16,384 KB.
MTBF
Mean time between failures—The average time (usually
expressed in hours) that a component works without failure.
MTTR
Mean time to recovery—The average time that a device will
take to recover from a non-terminal failure. The MTTR would
usually be part of a maintenance contract.
magazine
A 6-bin, removable, storage magazine for DLT
cartridges that fits inside the library.
N
Native mode
The uncompressed storage capacity of a tape
subsystem.
O
OCP
The OCP (operator control panel) on the front of the library
serves as the operator’s interface with the library. It provides a
screen with buttons allowing the operator to change and configure
the library.
P
PROM
Programmable read-only memory.
R
RAM
Random access memory—A portion of the system’s
memory that is designed as temporary storage of data and
programs.
rear panel
The rear cosmetic panel of the library that contains the
AC power switch, AC power receptacle and connectors for
attaching external cabling to the library.
S
Scalability
The capability provided by the DLTtape drive family
to read tapes from previous generations of drives. Allows users to
upgrade to a faster, higher capacity DLTtape drive, yet still be able
to read tape recorded on an older system. Often referred to as
backward compatibility.