HP XP P9500 Storage User Manual

Page 140

DKCMAIN

disk controller main. Refers to the microcode for the RAID storage system.

DKP

disk processor. Refers to the microprocessors on the back-end director features of the Universal
Storage Platform V.

error code

emulation

The operation of the RAID storage system to emulate the characteristics of a different storage
system. For device emulation the mainframe host “sees” the logical devices on the RAID storage
system as 3390-x devices. For controller emulation the mainframe host “sees” the control units
(CUs) on the RAID storage system as 2105 or 2107 controllers.

RAID storage system system operates the same as the storage system being emulated.

emulation group

A set of device emulation types that can be intermixed within a RAID group and treated as a
group.

env.

environment

ERC

error reporting communications

EXCTG

See extended consistency group (ECTG).

EXG

external volume group

ext.

external

extended
consistency group
(EXCTG)

A set of Continuous Access Journal Z journals in which data consistency is guaranteed. When
performing copy operations between multiple primary and secondary systems, the journals must
be registered in an EXCTG.

external
application

A software module that is used by a storage system but runs on a separate platform.

external port

A fibre-channel port that is configured to be connected to an external storage system for External
Storage operations.

external volume

A logical volume whose data resides on drives that are physically located outside the HP storage
system.

failback

The process of switching operations from the secondary path or host back to the primary path
or host, after the primary path or host has recovered from failure. See also failover.

failover

The process of switching operations from the primary path or host to a secondary path or host
when the primary path or host fails. See also failback.

FBA

fixed-block architecture

fibre channel; FlashCopy

FIBARC

Fibre Connection Architecture

FICON

Fibre Connectivity

free capacity

The amount of storage space (in bytes) that is available for use by the host systems.

fixed-size volume

GUI

graphical user interface

host failover

The process of switching operations from one host to another host when the primary host fails.

host group

A group of hosts of the same operating system platform.

host mode

Operational modes that provide enhanced compatibility with supported host platforms. Used
with fibre-channel ports on RAID storage systems.

host mode option

Additional options for fibre-channel ports on RAID storage systems. Provide enhanced functionality
for host software and middleware.

IML

initial microcode load; initial microprogram load

in-system
replication

The original data volume and its copy are located in the same storage system. Business Copy
in-system replication provides duplication of logical volumes; Snapshot in-system replication
provides “snapshots” of logical volumes that are stored and managed as virtual volumes (V-VOLs).