IBM Magstar 3494 manual Glossary

high-capacity output facility. The part of the tape library used to unload large numbers of cartridges from the tape library.

high-capacity input/output (I/O) facility. The part of the tape library used to load/unload large numbers of cartridges from the tape library.

home cell. A ®xed location that is assigned to a cartridge when it is ®rst inserted into the library.

home position. A position the cartridge accessor goes to when entering Pause mode. Home position is located at the far left side of the control unit frame.

host system. A data-processing system that is used to prepare programs and the operating environments for use on another computer or controller.

I

IPL. Initial program load.

icon. A pictorial representation of an object or a selection choice. Icons can represent objects that users want to work on or actions that users want to perform. See system menu icon.

Import. The VTS Import operation allows logical

volumes to be moved to a VTS from another VTS. The source VTS can be in the same tape library or in a

different tape library.

improved data recording capability (IDRC). A data recording mode that can increase the effective cartridge data capacity and the effective data rate if invoked.

initial program load (IPL). The initialization procedure that causes an operating system to commence operation.

insert. The operation of adding cartridges to the tape library. See also eject.

internet protocol (IP). A form of LAN communications protocol.

inventory. The operation of identifying the location of each tape cartridge contained in the tape library.

invoke. To start a command, procedure or program. The request for a feature or function to be utilized in future processing activities through the use of software or hardware commands.

L

light-emitting diode (LED). (1) A semiconductor chip that gives off visible or infrared light when activated. (2) A light that signals a change in status or the presence of a certain prede®ned condition.

library manager. The controller for the IBM 3494 Tape Library. It manages the location of tape cartridges, monitors performance, issues commands to the hardware, displays status, and performs other functions. It communicates with host systems through the Library Attachment Facility in each 3490E Subsystem and provides operator and service panel functions.

load. (1) The process, performed by an operator or by the cartridge accessor, of placing a cartridge into a location within the tape library for later use or retrieval.

(2)The term used when describing the action of the tape transport when it removes the leader block from a cartridge and threads the media through the internal tape path.

local area network (LAN). A computer network located on a user's premises within a limited geographical area. Communications within a LAN are not subject to external regulations; however, communications across a LAN boundary may be subject to regulation.

logical library. A logical library represents a set of tape volumes and tape drives that are a subset of all tape volumes and drives in a 3494 library. Each logical library within a 3494 library has a unique library sequence number identifying the logical library.

logical volume. A logical volume is a customer data volume which is stored on a stacked volume. A logical volume is not directly accessible by a host program.

The volume serial number of the logical volume is not externally visible to a human or machine.

M

magazine. A container residing in a storage frame. Each container consists of storage cells for holding tape cartridges.

manual mode. A mode of operation, where the operator, under the direction of the library manager, manually locates and moves cartridges to and from tape drives and storage cells. This mode allows data to be retrieved when normal tape library operations are interrupted by unexpected conditions.

menu. A panel containing a list of functions available for selection.

mount. A host command to load a cartridge into a tape unit.

mount from input station. A function available through the Commands pull-down on the library manager. It allows transient cartridges outside the library to be mounted on devices within the library and is used to support stand-alone programs that do not require the support of a full operating system.

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