Veritas Volume Manager 4.1 Administrator's Guide (HP-UX 11i v3, February 2007)

456 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.
boot disk group
A private disk group that contains the disks from which the system may be booted.
bootdg
A reserved disk group name that is an alias for the name of the boot disk group.
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 daemon that 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 of one or more subdisks within a striped plex. Striping is achieved by allocating 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.