Incr

A simple incremental backup, shown in Figure

 

23 on page 95, is based on the last backup that is still

 

protected, which can be a full backup or an incremental

 

backup.

Incr1-9

A leveled incremental backup, shown in Figure

 

24 on page 95, depends on the last backup of the next lower

 

level that is still protected. For example, an Incr1 backup

 

saves all changes since the last full backup, while an Incr5

 

backup saves all changes since the last Incr4 backup. An

 

Incr1-9 backup never references an existing Incr backup.

94

Planning your backup strategy