Recovery Windows

When creating a protection policy, you can define the following two recovery window attributes, expressed as intervals (typically days):

Disk recovery window goal

For each database assigned to the policy, Recovery Appliance attempts to support a point-in-time recovery to any time within this interval, counting backward from the current time. For example, if the recovery window goal is 15 days, and if it is noon on April 25, then the goal is the ability to perform point-in-time recovery to any time on or after noon on April 10. At noon on April 26, the goal is the ability to perform point-in-time recovery to any time on or after noon on April 11, and so on.

For disk, this interval is a goal, and not a guarantee. The Recovery Appliance might purge backups when disk space is low, in which case the goal is not always met. You can ensure that a minimum number of backups are guaranteed to be available by adjusting the reserved disk space property of each protected database.
SBT retention period

For each assigned database, backups are retained long enough on tape to support a point-in-time recovery to any time within this interval, counting backward from the current time. For SBT, this interval is a guarantee.