In Rapid Recovery 6.2.0 Windows Agent, a new changelog Bitmap was introduced. Upon upgrading an existing Rapid Recovery 6.1.x Windows Agent to 6.2.0 or newer, the changelog would be converted into a Bitmap.
If the changelog was larger than 1MB at the time of the upgrade, the full changelog would not get fully converted. Leading to new incremental backups to be missing data, resulting in incomplete filesystems and a damaged Recovery Point Chain.
This may lead to restore failures as the backed up filesystem is incomplete. This may manifest itself as failing to boot after a restore with errors such as "INACCESSIBLE BOOT DEVICE" or restored machines booting straight into Windows Repair screen.
Likewise performing a Chkdsk on the filesystem of an affected mounted Recovery Point would indicate errors on the file system structure.
Performing a new Base Image backup of the protected windows agent would ensure any new backups would not be affected by this issue.
This issue can only affect Agent protected Windows machines, that have had the Agent upgraded from 6.0.x/6.1.x to 6.2.0 or newer.
This issue has been identified as defect RR-109147. It occurs when the agent change log file on a volume is larger than 1 MB and the Rapid Recovery agent is upgraded from a version 6.1.3 or older to 6.2.0 or newer. Most agents that take regular backups and are rebooted immediately after upgrade will not experience this issue.
If you are considering upgrading to one of the affected versions, we advise the following steps to avoid this issue:
We are currently working on a script to attempt to identify this issue in recovery points that have already been taken. Until that script is ready, you can manually ensure that your backups are good by mounting the latest recovery point for each agent, validating that you can browse the data and open files, and by running a chkdsk on each mounted volume.
If there are any issues browsing the data or if chkdsk reports corruption, please run chkdsk on the production machine to ensure it's disks are healthy and then take a base image to ensure that you have a good backup.
This defect will be resolved in a future release of the Rapid Recovery Agent software.