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.
• Inc 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
backup. Even if the previous backup was an incremental (Inc or
Inc1, Inc2, ...) backup, the subsequent incremental backup includes
only those files that changed in the meantime.
• Inc1 backup
This backup type refers to the most recent still-protected full backup
with the same ownership. It does not depend on any previous
incremental backups. The files that have changed since the most
recent still-protected full backup are included in the backup.
• Inc2 backup
This backup type refers to the most recent still protected full backup,
provided that there is no Inc1 done afterwards. If there are several
Inc1 backups available, it refers to the most recent one. All files that
have changed since the reference backup was done are backed up.
• Inc1-9 backup
The description above explains the concept of incremental levels,
which can be extended up to Inc9.
Table 5-1 shows the relative referencing of backup runs with various
backup types:
How to Read Table
5-1?
• The rows in Table 5-1 are independent of each other and show
different situations.
Table 5-1 Relative Referencing of Backup Runs
1 full <---- Inc1
2 full <---- <---- <---- Inc2
3 full <---- Inc1 <---- Inc2
4 full <---- Inc
5 full <---- Inc1 <---- Inc
6 full <---- Inc1 <---- Inc2 <---- Inc
7 full <---- Inc1 <---- Inc <---- Inc
8 full <---- Inc1 <---- Inc3
9 full <---- Inc1 <---- Inc2 <---- Inc3
10 full <---- <---- <---- Inc2 <---- Inc3
11 full <---- <---- <---- <---- <---- Inc3
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