Medium Changer card pack (MCC or MCP)
In the TS3500 Tape Library, a circuit board
that provides a communication path to
each tape drive (via the RS-422 interface)
so that library commands can be funneled
from the tape drives to the accessor. It
includes one RS-422 interface allotted for
each drive in the frame. It also provides
management and service interfaces to
outside servers. For each library frame
that contains at least one drive, there is
one MCP. The electronics of the card pack
are located in the FCB.
Medium Changer Device
In SCSI terms, an instrument that moves
removable storage units from and to
storage slots and tape drives. The TS3500
Tape Library is a Medium Changer
Device.
megabyte (MB)
1 000 000 bytes.
metal-particle tape
In the LTO Ultrium and 3592 tape
cartridges, tape that uses very small, pure
metal particles (rather than oxide
coatings) in the magnetic layer.
meter In the Metric System, the basic unit of
length; equal to approximately 39.37
inches.
MiB One mebibyte (MiB) = 1,048,576 bytes.
MIB See Management Information Base.
middleware
A vague term that refers to the software
between an application program and the
lower-level platform functions.
micron
One millionth of a meter (.000001 m).
Microsoft Systems Management Server (SMS)
and Clustered Server Environments
A solution from Microsoft that
automatically detects system or network
failures in Windows operating systems
and eliminates a single point of failure by
managing failover to a recovery processor.
mid-range systems
A set of multi-user servers with a hard
disk capacity of between 50 GB and 250
GB.
mixed drive types
The concept of using both LTO Ultrium
and 3592 tape cartridges in the TS3500
Tape Library. A library can consist of
frames that house all LTO Ultrium tape
cartridges or all 3592 tape cartridges, but
the two types of cartridges cannot be
mixed in a single frame. However, both
types of cartridges may be inserted or
removed from the library through the
base frame, provided that a lower I/O
station is installed for the 3592 tape
cartridges.
mixed media configuration
Different media and drive technologies,
such as the Ultrium Tape Drive and the
TS1120 Tape Drive. Ultrium 1, Ultrium 2,
and Ultrium 3 drives and media are not
considered mixed media, but are
considered different generations of the
same type of media.
Model J1A
See IBM TotalStorage 3592 Tape Drive Model
J1A.
mount The act of making a tape available for
processing by a specific tape device. A
mount consists of removing the cartridge
from a drive, returning it to its storage
slot, collecting another cartridge from a
storage slot, moving it to the drive, and
loading it into the drive.
mount/demount cycle
See mount.
mounted
The state of a tape while it is available for
processing by a specific tape device.
mount throughput
The number of cartridges that a tape
library can mount in a one-hour period.
N
N A measure of the electrical power load in
a system. If there are N loads in the
system, N power supplies are required to
power all of the loads.
N/A Not applicable.
native data capacity
The amount of data that can be stored
without compression on a tape cartridge.
NetView
®
(1) Pertaining to an IBM licensed program
that is used to monitor a network,
manage it, and diagnose its problems. The
Glossary 245
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