VERITAS Volume Manager 3.5 Administrator's Guide (September 2002)

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Glossary
active/active disk arrays
This type of multipathed disk array allows you to access a disk in the disk array through
all the paths to the disk simultaneously, without any performance degradation.
active/passive disk arrays
This type of multipathed disk array allows one path to a disk to be designated as primary
and used toaccess thedisk at any time.Using apath other thanthe designatedactive path
results in severe performance degradation in some disk arrays. Also see path, primary
path, and secondary path.
associate
The process of establishing a relationship between VxVM objects; for example, a subdisk
that has been created and defined as having a starting point within a plex is referred to as
being associated with that plex.
associated plex
A plex associated with a volume.
associated subdisk
A subdisk associated with a plex.
atomic operation
An operation that either succeeds completely or fails and leaves everything as it was
before the operation was started. If the operation succeeds, all aspects of the operation
take effect at once and the intermediate states of change are invisible. If any aspect of the
operation fails, then the operation aborts without leaving partial changes.
In a cluster, an atomic operation takes place either on all nodes or not at all.
attached
A state inwhich a VxVM objectis both associatedwith anotherobjectand enabledfor use.