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

316 VERITAS Volume Manager Administrator’s Guide
FastResync
A fast resynchronization feature that is used to perform quick and efficient
resynchronization of stale mirrors, and to increase the efficiency of the snapshot
mechanism. Also see Persistent FastResync and Non-Persistent FastResync.
Fibre Channel
A collective name for the fiberoptic technology that is commonly used toset up a Storage
Area Network (SAN).
file system
A collection of files organized together into a structure. The UNIX file system is a
hierarchical structure consisting of directories and files.
free space
An area of a disk under VxVM control that is not allocated to any subdisk or reserved for
use by any other VxVM object.
free subdisk
A subdisk that is not associated with any plex and has an empty putil[0] field.
hostid
A string that identifies a host to VxVM. The hostid for a host is stored in its volboot file,
and is used in defining ownership of disks and disk groups.
hot-relocation
A technique of automatically restoring redundancy and access to mirrored and RAID-5
volumes when a disk fails. This is done by relocating the affected subdisks to disks
designated as spares and/or free space in the same disk group.
hot-swap
Refers to devices that can be removed from, or inserted into, a system without first
turning off the power supply to the system.
initiating node
The node on which the system administrator is running a utility that requests a change to
VxVM objects. This node initiates a volume reconfiguration.
JBOD
The common name for an unintelligent disk array which may, or may not, support the
hot-swapping of disks. The name is derived from “just a bunch of disks.”