About keeping backup sets
|Article:HOWTO74144|||||Created: 2012-03-02|||||Updated: 2012-03-16|||||Article URL http://www.symantec.com/docs/HOWTO74144|
Backup Exec keeps the backup sets that are stored on disk or on cloud storage for as long as you specify in the backup job properties. By default, the amount of time that backup sets are stored on disk is based on the type of backup job and its schedule.
For example, you can specify to keep the backup sets from a full backup for two weeks. After two weeks, the backup sets expire and Backup Exec can reclaim that disk space. If you later create an incremental backup, Backup Exec keeps the full backup sets for two weeks, plus the amount of time that it keeps the incremental backup sets. If you keep the incremental backup sets for four weeks, then Backup Exec keeps the full backup sets for six weeks. The data from a full backup is kept as long as the data from its associated incremental backups. Backup Exec does not expire backup sets from a job that depends on another job until the data retention expires for all of the associated jobs.
Table: Storage types and backup set retention
Type of storage
Backup data retention
Disk and cloud storage
Backup Exec uses data lifecycle management to automatically expire the backup sets when the amount of time that is specified in the backup job expires. If backup sets are dependent on other backup sets, then Backup Exec does not expire the data until all expiration dates are reached.
For disk-based storage that you reattach to the Backup Exec server after a specified number of days, you can prevent Backup Exec from reclaiming that disk space. A global setting limits Backup Exec to read-only operations on disk-based storage if it has been detached for a specified number of days. You can also limit Backup Exec to read-only operations per disk storage device by enabling the setting on the device properties.
Tape and disk cartridge media
Backup Exec uses the Advanced Device and Media Management (ADAMM) feature to manage data retention on tape and disk cartridge media. ADAMM expires the backup sets that are stored on media according to a set of rules that you apply to the media. The set of rules that manage tape and disk cartridge media is called a media set. You create media sets that specify append periods, overwrite protection periods, and vaulting periods.
See About media sets
Article URL http://www.symantec.com/docs/HOWTO74144