VERITAS Volume Manager 3.1 Administrator's Guide

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root partition The disk region
on which the root file system
resides.
root volume The VxVM volume
that contains the root file system,
if such a volume is designated by
the system configuration.
rootability The ability to place
the root file system and the swap
device under Volume Manager
control. The resulting volumes can
then be mirrored to provide
redundancy and allow recovery in
the event of disk failure.
secondary path In
Active/Passive type disk arrays,
the paths to a disk other than the
primary path are called secondary
paths. A disk is supposed to be
accessed only through the primary
path until it fails, after which
ownership of the disk is
transferred to one of the secondary
paths. See “path”, “primary path”.
sector A unit of size, which can
vary between systems. Sector size
is set per device (hard drive,
CD-ROM, and so on). Although all
devices within a system are
usually configured to the same
sector size for interoperability, this
is not always the case. A sector is
commonly 512 bytes.
shared disk group A disk group
in which the disks are shared by
multiple hosts (also referred to as
a cluster-shareable disk
group).
shared volume A volume that
belongs to a shared disk group and
is open on more than one node at
the same time.
shared VM disk A VM disk that
belongs to a shared disk group.
slave node A node that is not
designated as a master node.
slice The standard division of a
logical disk device. The terms
partition and slice are
sometimes used synonymously.
spanning A layout technique
that permits a volume (and its file
system or database) too large to fit
on a single disk to span across
multiple physical disks.
sparse plex A plex that is not as
long as the volume or that has
holes (regions of the plex that don’t
have a backing subdisk).
stripe A set of stripe units that
occupy the same positions across a
series of columns.