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To schedule a replication for a disk safe, you need to create a *policy* assigned to this disk safe. You can schedule recurring policies or create one-time policies. The policy starts at the time you have specified in the policy properties. The policy properties include information about how many recovery points to keep in the disk safe.

The data protection policy can include the following details:
* *Scheduling*. The process of creating a schedule. You can schedule the policy to run at a time that is most convenient for you.
* *Recovery point retention rules*. The rules that define how many recovery points to keep in the disk safe. SBM merges old recovery points.
* *File/folder excludes*. User-selected files and folders missed during replication. You can define a file mask or pattern to exclude files.
* *Archiving*
* *SQL, Exchange, MySQL, control panel backup options*

h5. Synchronization

Every time a backup job is run, Server Backup Manager performs a *synchronization*. During the synchronization process, the system creates a point-in-time snapshot of the disk volume and computes deltas based on the last completed synchronization. The deltas are block level and are usually computed at a level below the file system, very close to the raw disk structure. These deltas represent the low-level changes made to the disk volume since the last recovery point.

These changes include:
* *Create/Schedule*
* *Edit*
* *Enable/Disable*
* *Run*
* *Delete*

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{excerpt:hidden=true}General description of the policy idea in Server Backup Manager.{excerpt}