HP B6960-96035 Concepts Manual page 359

directory junction
disaster recovery
Disk Agent
Disk Agent
concurrency
disk discovery
disk group
disk image
(rawdisk) backup
disk quota
disk staging
(Windows specific term) Directory junctions use the reparse
point concept of Windows. An NTFS 5 directory junction allows
you to redirect a directory/file request to another location.
A process to restore a client's main system disk to a state close
to the time when a (full) backup was performed.
A component needed on a client to back it up and restore it.
The Disk Agent controls reading from and writing to a disk.
During a backup session, the Disk Agent reads data from a disk
and sends it to the Media Agent, which then moves it to the
device. During a restore session the Disk Agent receives data
from the Media Agent and writes it to the disk.
The number of Disk Agents that are allowed to send data to one
Media Agent concurrently.
The detection of disks during client backup with disk discovery.
During this backup, Data Protector discovers (detects) the disks
that are present on the client — even though they might not have
been present on the system when the backup was configured
— and backs them up. This is particularly useful in dynamic
environments, where configurations change rapidly. After the
disks are expanded, each inherits all options from its master
client object. Even if pre- and post-exec commands are specified
once, they are started many times, once per each object.
(Veritas Volume Manager specific term) The basic unit of data
storage in VxVM system. A disk group can consist of one or
more physical volumes. There can be more than one disk group
on the system.
A high-speed backup where Data Protector backs up files as
bitmap images. A disk image (rawdisk) backup does not track
the files and directory structure stored on the disk, but stores a
disk image structure on byte level. You can perform a disk image
backup of either specific disk sections or a complete disk.
A concept to manage disk space consumption for all or a subset
of users on a computer system. This concept is used by several
operating system platforms.
The process of backing up data in several phases to improve
the performance of backups and restores, reduce costs of storing
Concepts guide 359