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

312 VERITAS Volume Manager Administrator’s Guide
block
The minimum unit of data transfer to or from a disk or array.
boot disk
A disk that is used for the purpose of booting a system.
clean node shutdown
The ability of a node to leave a cluster gracefully when all access to shared volumes has
ceased.
cluster
A set of hosts (each termed a node) that share a set of disks.
cluster manager
An externally-provided daemonthat runs on each node in a cluster. The cluster managers
on each node communicate with each other and inform VxVM of changes in cluster
membership.
cluster-shareable disk group
A disk group in which access to the disks is shared by multiple hosts (also referred to as a
shared disk group). Also see private disk group.
column
A set ofone ormoresubdisks withina striped plex. Striping isachieved byallocating data
alternately and evenly across the columns within a plex.
concatenation
A layout style characterized by subdisks that are arranged sequentially and contiguously.
configuration copy
A single copy of a configuration database.
configuration database
A set of records containing detailed information on existing VxVM objects (such as disk
and volume attributes).