| 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 | Determines in which sequence media are used for backup. The |
policy | 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 | The |
factors | to determine the state of a medium. |
medium ID | A unique identifier assigned to a medium by Data Protector. |
media label | A |
media location | A |
| 4" or |
media | A session performing some action on a medium, such as |
management | initializing, scanning the content, verifying data on a medium, |
session | 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 | The media usage policy controls how new backups are added |
policy | to the already used media. It can be Appendable, |
| |
| only. |
Concepts guide | 375 |