• COPY - The mirrored pair is currently re-synchronizing. Data is transferred from one disk to the other. The disks do not contain the same data.

• PAIR - The mirrored pair is completely synchronized and both disks (the primary volume and the mirrored volume) contain identical data.

 

• SUSPENDED - The link between the mirrored disks is

 

suspended. That means that both disks are accessed and

 

updated independently. However, the mirror relationship is

 

still maintained and the pair can be re-synchronized without

 

transferring the complete disk.

parallel restore

Restoring backed up data to multiple disks at the same time (that

 

is, in parallel) by running multiple Disk Agents, that receive data

 

from one Media Agent. For the parallel restore to work, select

 

data that is located on different disks or logical volumes and

 

during backup, the data from the different objects must have

 

been sent to the same device using a concurrency of 2 or more.

 

During a parallel restore, the data for multiple objects selected

 

for restore is read from media at the same time, thereby

 

improving performance.

parallelism

The concept of reading multiple data streams from an online

 

database.

physical device

A physical unit that contains either a drive or a more complex

 

unit such as a library.

post-exec

A backup option that executes a command or script after the

 

backup of an object or after the entire session completes.

 

Post-exec commands are not supplied by Data Protector. You

 

need to create your own. They can be written as executables

 

or batch files on Windows and as shell scripts on UNIX.

 

See also pre-exec.

pre- and post-exec

Pre- and post-exec commands are used to perform additional

commands

action before and after a backup or restore session. They are

 

not supplied by Data Protector. You need to create your own

 

commands. They can be written as executables or batch files

 

on Windows and as shell scripts on UNIX.

prealloc list

A subset of media in a media pool that specifies the order in

 

which media are used for backup.

382Glossary