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GBIC Gigabit interface converter. A widely used transceiver module for Fibre Channel.
A GBIC is modular and hot-swappable and can be either copper or optical.
generic device A disk or tape device. When generic storage devices are visible to a host running
the Hardware Abstraction Layer (HAL), the CommandCentral Storage Console
displays the correct object type.
generic group A user-definedcollectionofswitches, hosts,andstoragedevices. TheGroupBuilder
toolis usedtocreate andmodifygeneric groups.Seealsogroup, objectdependency
group.
group Aclass orcollection ofstorage objects.Groupsare usefulfor anumberof different
purposes, for example scoping reports and views to encompass a set of objects
with similar attributes. CommandCentral Storage supports two types of groups:
generic groups,which aredefined byusers, and objectdependency groups,which
are definedautomatically totrack volumesand file systemshaving dependencies
on specific applications.
GS explorer An explorer that uses the Fibre Channel Common Transport (CT) protocol to
discover switches in-band over Fibre Channel, obtain switch characteristics, and
explore port connectivity. Prior to CommandCentral Storage version 5.x, the GS
explorer was known as the MGEX explorer.
guest operatingsystem An operating system that is installed on a virtual machine. See also managed
virtual host.
hard zoning Afabric zoning method in which a Fibre Channel switch actively blocks access to
zone members from any objects outside the zone. Because the active blocking
takes place at the level of ports on the switch, hard zoning is also referred to as
switch port zoning. Inhard zoning, each switch uses a routingtable to determine
whether data is allowed to flow across a connection. See also soft zoning.
HAL (hardware
abstraction layer)
A component that performs device discovery and management for storage
applications and devices. HAL maintains a real-time topology of the storage
network andinteracts directly with switchesand storage arraysto control access
to storage resources. HAL extends the functionality offered in previous releases
of CommandCentralStorage, providingthe abilityto monitor andmanage alarge
number of storage devices.
HBA Host bus adapter. An interface between a server or workstation bus and a Fibre
Channel network.
HBA port group A group of HBA ports for which a single LUN masking operation applies to each
port in the group. In CommandCentral Storage, you can create HBA port groups
usingthe Console.For EMCEVA andCLARiiON arrays,the termhostmay beused
to refer to an HBA port group. For NetApp devices, the term initiator group is
used. See also LUN masking.
host bus adapter See HBA.
41CommandCentral Glossary