Sun Microsystems SL8500 manual ECMSee electronics control module, ModuleThe assembly that

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ECMSee electronics control module.

electronics control

moduleThe assembly that:

■Processes commands from a host system

■Coordinates the activities of robots, elevators, pass-thru ports, and tape drives

■Monitors status inputs from sensors and switches

elevatorThe device that transports cartridges vertically, across rail boundaries.

emergency power-off

(EPO)(1) A safety scheme that allows a “power down” of a subsystem or a system as a whole instead of powering it down component-by-component.

(2)A safety switch on a machine or in a data center that allows a user to immediately power down a machine or a data center power supply by cutting off the external source power.

See also Emergency Robotics Stop.

Emergency Robotics

StopA button on the customer interface module keypad that removes power to the robotics power grid, leaving the remaining library power on.

Enterprise Systems

Connection (ESCON)A set of fiber-optic based products and services developed by IBM that allows devices within a storage environment to be dynamically configured. A channel-to- control unit I/O interface that uses optical cables as a transmission medium.

environmental monitorsA collective term for the sensors that track temperatures, fan speeds, and the

status of various other mechanism within a library.

EPOSee emergency power-off.

ESCONSee Enterprise Systems Connection.

EthernetA local-area, packet-switched network technology. Originally designed for coaxial cable, it is now found running over shielded, twisted-pair cable. Ethernet is a 10- or 100-megabytes-per-second LAN.

exportThe action in which the library places a cartridge into the cartridge access port so that the operator can remove the cartridge from the library. Synonymous with eject.

F

failoverThe act of moving to a secondary or redundant path when the primary path fails.

FFCFlat flexible cable.

142 StreamLine™ SL8500 Modular Library System User's Guide • March 2007 Revision K • 96154