HP B6960-96035, Руководство по концепциям

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During a restore session, a Media Agent locates data on the
backup medium and sends it to the Disk Agent. The Disk Agent
then writes the data to the disk. A Media Agent also manages
the robotics control of a library.
media allocation
policy Determines in which sequence media are used for backup. The
Strict allocation policy directs Data Protector to prompt for a
specific medium. The Loose policy directs Data Protector to
prompt for any suitable medium. The Formatted First policy
directs Data Protector to give preference to unknown media,
even if unprotected media are available in the library.
media condition The quality of a medium as derived from the media condition
factors. Heavy usage and age result in an increased number of
read and write errors with tape media. Media need to be
replaced when they are marked as POOR.
media condition
factors The user-assigned age threshold and overwrite threshold used
to determine the state of a medium.
medium ID A unique identifier assigned to a medium by Data Protector.
media label A user-defined identifier used to describe a medium.
media location A user-defined physical location of a medium, such as "building
4" or "off-site storage".
media
management
session A session performing some action on a medium, such as
initializing, scanning the content, verifying data on a medium,
or copying a medium.
media pool A set of media of the same type (such as DDS) used and tracked
as a group. Media are formatted and assigned to a media pool.
media set The result of a backup session is data backed up on a group of
media called media set. Depending on the media usage policy,
several sessions can share the same media.
media type The physical type of media, such as DDS or DLT.
media usage
policy The media usage policy controls how new backups are added
to the already used media. It can be
Appendable
,
Non-Appendable
, or
Appendable for incrementals
only
.
Concepts guide 375