Patent attributes
A standby site is periodically synchronized to a primary site. The synchronizing includes copying blocks of a source volume at the primary site that have changed since a last synchronization to the standby site, and a bitmap specifying locations of the changed blocks. A synthetic full copy of the source volume is generated at the standby site. The synthetic full backup is validated by using the bitmap to identify locations on the synthetic full backup to verify. These locations correspond to the changed blocks. A progress of the validation is tracked. A user can specify a threshold percentage value of data that upon being validated indicates that the standby site is ready to assume production operation from the primary site. A readiness of the standby site to assume production operation is reported based on the progress of the validation and the threshold percentage value.
