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

Glossary 465
rootability
The ability to place the root file system and the swap device under VxVM 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 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. Also
see path and 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 1024
bytes.
shared disk group
A disk group in which access to the disks is shared by multiple hosts (also referred to as a
cluster-shareable disk group). Also see private disk group.
shared volume
A volume that belongs to a shared disk group and is open on more than one node of a
cluster at the same time.
shared VM disk
A VM disk that belongs to a shared disk group in a cluster.
slave node
A node that is not designated as the master node of a cluster.
slice
The standard division of a logical disk device. The terms partition and slice are sometimes
used synonymously.
snapshot
A point-in-time copy of a volume (volume snapshot) or a file system (file system
snapshot).