IBM DS8000 Eight pack, Electrostatic discharge ESD, Emergency power off EPO, Enclosure, ESA/390

EC See engineering change.

ECKD See extended count key data.

eight pack

See disk pack.

electrostatic discharge (ESD)

An undesirable discharge of static electricity that can damage equipment and degrade electrical circuitry.

emergency power off (EPO)

A means of turning off power during an emergency, usually a switch.

EMIF See ESCON multiple image facility.

enclosure

A unit that houses the components of a storage subsystem, such as a control unit, disk drives, and power source.

end of file

A coded character recorded on a data medium to indicate the end of the medium. On a count-key-data direct access storage device, the subsystem indicates the end of a file by including a record with a data length of zero.

engineering change (EC)

An update to a machine, part, or program.

Enterprise Systems Architecture/390 (ESA/390)

An IBM architecture for mainframe computers and peripherals. Processor systems that follow the ESA/390 architecture include the ES/9000® family. See also z/Architecture.

Enterprise Systems Connection (ESCON)

1)A zSeries computer peripheral interface. The I/O interface uses zSeries logical protocols over a serial interface that configures attached units to a communication fabric.

2)A set of IBM products and services that provide a dynamically connected environment within an enterprise.

EPO See emergency power off.

ERDS See error-recording data set.

ERP See error recovery procedure.

error-recording data set (ERDS)

On zSeries hosts, a data set that records data-storage and data-retrieval errors. A

service information message (SIM) provides the error information for the ERDS.

error recovery procedure (ERP)

Procedures designed to help isolate and, where possible, to recover from errors in equipment. The procedures are often used in conjunction with programs that record information on machine malfunctions.

ESA/390

See Enterprise Systems Architecture/390.

ESCD See ESCON director.

ESCON

See Enterprise System Connection.

ESCON channel

A zSeries channel that supports ESCON protocols.

ESCON director (ESCD)

An I/O interface switch that allows the interconnection of multiple ESCON interfaces in a distributed-star topology.

ESCON host systems

zSeries hosts that attach to the DS8000 with an ESCON adapter. Such host systems run on operating systems that include MVS, VSE, TPF, or versions of VM.

ESCON multiple image facility (EMIF) For zSeries, a function that enables LPARs to share an ESCON channel path by providing each LPAR with its own channel-subsystem image.

EsconNet

In the DS Storage Manager, the label on a pseudo host icon that represents a host connection that uses the ESCON protocol and that is not completely defined on the DS8000. See also pseudo host and access-any mode.

ESD See electrostatic discharge.

eserver

See IBM e(logo)server.

ESSNet

See IBM TotalStorage Enterprise Storage Server Network.

extended binary-coded decimal interchange code (EBCDIC)

An IBM-developed coding scheme used to represent various alphabetic, numeric, and

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