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Selecting a Backup Type: Full or Incremental
Chapter 5 213
Selecting a Backup Type: Full or Incremental
To save time and media during a backup, you can combine full and
incremental backups. For example, you can create a second-level
incremental backup based on a previous first-level incremental backup, a
third-level incremental backup based on a previous second-level
incremental backup, and so on.
The backup type (full or incremental) applies to the entire backup
specification and only to filesystem objects.
The backup type is ignored for zero downtime backup sessions (split
mirror or snapshot backup). It is set to full.
To combine full and incremental backups, make sure that the backup
object has exactly the same:
•client name
•drive/mountpoint
• description
The description can be set for the whole backup specification or for a
specific object. Refer to “Backup Specification Options” on page 236
and “Object Options” on page 239.
•owner
Backup ownership can be set for the whole backup specification.
Refer to “Ownership: Who Will Be Able to Restore?” on page 235.
Backup Types • Full backup
A full backup consists of all backup objects, even if they have been
backed up before. The first backup of an object is always a full
backup. Any subsequent backup will be completed as full if no
protected full backups with the same ownership are available at the
backup time.
• Incr backup
This backup type is based on any previous, still protected backup
chain, either a full or an incremental backup. An incremental backup
includes only the files that have changed since the last still protected