What is a backup chain?

On Vinchin Backup & Recovery, backup chains are usually created by incremental or forever incremental backup jobs. Each backup chain begins with a full restore point and ends with a series of incremental restore points. For VM recovery, all the incremental restore points on the backup chain are dependent on the full restore point, and each incremental restore point is dependent on the other incremental restore point(s) in front of it on the chain.

For the incremental backup, each VM included in the job will usually have several backup chains created in the backup storage. While for the forever incremental backup, each VM included in the job will have only one backup chain created in the backup storage.