IBM Magstar 3494 manual Enhanced Capacity Cartridge System Tape

control program. The program in the host system that schedules and supervises the execution of application programs.

convenience input. The term used when loading small numbers of tape cartridges into the tape library using the convenience input station.

convenience input/output station. The part of the tape library used to load and unload small numbers of cartridges into the tape library.

D

DCAF. Distributed Console Access Facility. A LAN communication program.

Danger notice. A special note in text that calls attention to a situation that is potentially lethal or extremely hazardous to people. See also Caution notice.

database. A collection of data that can be accessed by a data processing system for a speci®c purpose.

demount. A host command to unload a cartridge from a tape drive.

dialog box. With the library manager, a moveable window, ®xed in size, that requests information from the user.

diskette. A thin, ¯exible magnetic disk and a protective jacket, in which the disk is permanently enclosed. See also hard disk.

Distributed Console Access Facility (DCAF). A LAN communication program.

double-click.With the library manager, the act of pressing a pointing device button twice within a time limit while holding the pointing device pointer on the selected item. See also click.

drop-down list. A drop-down list only displays one item until the user takes an action to display the other objects or choices.

dual active accessors (DAA). The dual active accessors feature consists of two cartridge accessors and microcode which enables them to be active at the same time. Under normal operation, both accessors are active when this feature is installed.

dual library manager. The dual library manager consists of two library managers. Under normal operation, one library manager is the active library manager and the other library manager is the standby library manger.

dump. To record data, at a particular instant, for the purpose of safeguarding or analyzing.

E

EPO. See Emergency Power Off.

eject. The operation of moving a cartridge to an output station in the tape library.

Emergency Power Off (EPO). A switch that removes all power from the equipment in the IBM 3494 Tape Library but does not affect power to lighting circuits.

enable. To provide the means or opportunity. The modi®cation of system, control unit, or device action through the change of a software module or a hardware switch (circuit jumper) position.

Enhanced Capacity Cartridge System Tape.

Cartridge system tape with increased capacity that can be used with 3490E enhanced capability models only. Visually identi®ed by a two-tone cartridge case.

Ethernet. A local area network (LAN) that allows multiple stations to access a data transmission without prior coordination.

Export. The VTS Export operation allows logical

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

Exported Stacked Volume. A physical volume

managed by a VTS that contains logical volumes that can be removed from the VTS.

F

®le protected. Pertaining to a tape volume from which data can be read only. Data cannot be written on or erased from the tape.

frame. (1) A housing for machine or device elements.

(2)The hardware support structure, covers, and all

parts mounted therein that are packaged as one entity for shipping.

G

gripper. A part attached to the picker mechanism of the cartridge accessor that loads or unloads cartridges from storage cells and the Convenience Input¤Output Station.

H

hard disk. A rigid, non-removable disk residing in the library manager.

high availability unit. A second library manager and a second accessor.

342Magstar 3494 Tape Library Operator Guide