Before You Begin

This section lists considerations and limitations common for creating backup jobs.

Backup Infrastructure

  • Backup infrastructure components that will take part in the backup process must be added to the backup infrastructure and properly configured. These include Microsoft Hyper-V hosts on which VMs are located and a backup repository. If you want to perform backup in the off-host backup mode, the off-host backup proxy must also be added to the backup infrastructure and properly configured.
  • The backup repository must have enough free space to store created backup files. To receive alerts about low space in the backup repository, configure global notification settings. For more information, see Specifying Other Notification Settings.
  • If you plan to map a backup job to a backup file that already exists in the backup repository, you must perform the rescan operations for this backup repository. Otherwise, Veeam Backup & Replication will not be able to recognize backup files in the backup repository. For more information, see Rescanning Backup Repositories.
  • If Microsoft Hyper-V Server 2016 or later is added along with hosts of lower versions to the same cluster, Veeam Backup & Replication will not use new mechanisms (for example, online backup with checkpoints and RCT for change block tracking) for VMs in this cluster. The new mechanisms will be used only after you perform the following actions:
    • Upgrade all nodes in the cluster to Microsoft Hyper-V Server 2016 or later.
    • Upgrade the cluster functional level.
    • Upgrade VM configuration version to 8.x.
  • [For Dell Data Domain backup repository] The length of forward incremental and forever forward incremental backup chains that contain one full backup and a set of subsequent incremental backups cannot be greater than 60 restore points. To overcome this limitation, schedule full backups (active or synthetic) to split the backup chain into shorter series. For example, to perform backups at 30-minute intervals, 24 hours a day, you must schedule synthetic fulls every day. In this scenario, intervals immediately after midnight may be skipped due to the duration of synthetic processing. For more information, see How Synthetic Full Backup Works.

Backup Job Configuration

  • If you plan to use pre-job and post-job scripts, you must create scripts before you configure the backup job.
  • If you plan to migrate VMs between hosts in the cluster or SCVMM, you will not have to reconfigure jobs in Veeam Backup & Replication. Veeam Backup & Replication will automatically locate migrated VMs and continue processing them as usual. If you migrate VMs between standalone hosts that are not a part of one cluster or SCVMM server registered in Veeam Backup & Replication, you will have to reconfigure jobs to include the migrated VMs. After that, Veeam Backup & Replication will create full backups for these VMs. If you do not reconfigure the jobs, they will fail.

Guest Processing

  • If you plan to use pre-freeze and post-thaw scripts, you must create scripts before you configure the backup job.
  • Dynamic disks and FAT/FAT32 disks can be backed up only with disabled application-aware processing.

 

Page updated 9/23/2025

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