Tandberg Data Storage Library T128, Руководство пользователя

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Tandberg StorageLibrary T128 User’s Guide 173
Glossary
1U, 2U, 3U, etc.
Racks manufactured for mounting computer hardware often define vertical space as "units." The
components that are mounted in the racks are defined by how many units of rack space they require. For
example, the height of a unit in a rack is 1.75". If a component is 5.25" in thickness, the component is said
to be a 3U component.
Arbitrated loop
A Fibre Channel configuration that attaches multiple communicating ports in a loop. Two or more ports can
interconnect, but only two ports can communicate simultaneously.
Arbitration
The submission of a request to gain access to an arbitrated loop by a device, so that it can transmit data in
the loop.
Availability
A RAS attribute that refers to the accessibility of a system resource in a timely manner; for example, the
measurement of a system’s uptime.
Barcode
A printed array of varied rectangular bars and spaces that can be scanned and read for object identification.
Bus
A transmission channel through which electrical signals are carried from one device to another device.
CAN (Controller Area Network)
A serial bus network of microcontrollers that connects devices, sensors and actuators in a system or
sub-system for real-time control applications. There is no addressing scheme used in controller area
networks, as in the sense of conventional addressing in networks (such as Ethernet). Rather, messages are
broadcast to all the nodes in the network using an identifier unique to the network.
Cartridge
A container that is a protective housing for storage media, such as cartridges for tapes or optical disks.
Channel zoning
A method of subdividing a storage area network into disjoint zones on a per-channel basis in order to
enhance security and qualify access.
Cleaning tape / cleaning cartridge
A tape used to clean recording heads and reading heads on a tape drive.
Cleaning slot
The physical home where a cleaning tape or cartridge resides.
CLI (Command Line Interface)
A method of interfacing with a file system in which the user types commands, using a specific command
syntax, from a command line.