IBM System Storage TS3500, Введение и руководство по планированию

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protocol, is based on the standards
contained within the X.500 standard, but
is significantly simpler. And unlike X.500,
LDAP supports TCP/IP, which is
necessary for any type of Internet access.
Linear Tape-Open (LTO)
A type of tape storage technology
developed by the IBM Corporation,
Hewlett-Packard, and Certance. LTO
technology is an “open format”
technology, which means that its users
have multiple sources of product and
media. The “open” nature of LTO
technology enables compatibility between
different vendors' offerings by ensuring
that vendors comply with verification
standards. The LTO technology is
implemented in two formats: the Accelis
format focuses on fast access; the Ultrium
format focuses on high capacity. The
Ultrium format is the preferred format
when capacity (rather than fast access) is
the key storage consideration.
line frequency
The frequency (in hertz) of the AC line
voltage that the TS3500 Tape Library
requires for normal operation.
link In Fibre Channel technology, the physical
(optical) connection between two nodes of
a network, which includes the
combination of the link connection (the
transmission medium) and two link
stations, one at each end of the link
connection.
liquid crystal display (LCD)
A low-power display technology used in
computers and other I/O devices.
load Pertaining to the TS3500 Tape Library and
following the insertion of a tape cartridge
into a cartridge storage slot, the act
(performed by the cartridge accessor) of
transferring the cartridge from the storage
slot to the drive and of positioning the
tape (performed by the tape drive) for
reading or writing by the drive head.
load and unload cycle
The act of inserting a cartridge into a tape
drive, loading the tape to load point,
rewinding the tape into the cartridge, and
ejecting the cartridge from the drive.
load point
The beginning of the recording area on
magnetic tape.
load-to-ready time
After a cartridge has been inserted into a
drive, the amount of time between when
the drive threads the tape and when the
drive becomes ready to accept server
commands.
local area network (LAN)
(1) A computer network located on a
user's premises within a limited
geographical area. Communication within
a local area network is not subject to
external regulations; however,
communication across the LAN boundary
may be subject to some form of
regulation.
(2) A network in which a set of devices is
connected to other sets of devices for
communication and that can be connected
to a larger network.
logical library
A set of cartridge storage slots and tape
drives that are defined as a library by an
operator. The operator identifies the slots
and drives to the library by their location
or count. The ability of the TS3500 Tape
Library to create logical libraries makes it
possible for similar and dissimilar hosts
(servers) to share its robotics. As a result,
hosts can simultaneously run separate
applications in separate logical libraries.
logical library bar code label
A specially coded label that can be affixed
to the tops of storage slot columns and
drives inside the TS3500 Tape Library. The
tape library reads the labels and uses
them to establish the boundaries of one or
more logical libraries.
logical library configuration
A way of using the TS3500 Tape Library
so that its robotics are shared by
homogenous (similar) and heterogeneous
(dissimilar) servers. The TS3500 Tape
Library can be partitioned into individual
logical libraries that independently
communicate with individual servers via
individual control paths.
logical unit number (LUN)
A number associated with the target
Glossary
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