Constraints

General

• A vault can be associated with only one backup policy.
• A vault can be associated with only one replication policy.
• A vault can be associated with a maximum of 256 resources.
• A maximum of 32 backup policies and 32 replication policies can be created.
• Only backups in the Available or Locked vaults can be used to restore data.
• Backups in a Deleting vault cannot be deleted.
• When Storage Disaster Recovery Service (SDRS) is used to set up disaster recovery for cloud servers, restorations can be performed at the disaster recovery site only after DR protection is disabled.
• Backups cannot be downloaded to a local PC or uploaded to OBS.
• A vault and its associated servers or disks must be in the same region.

Cloud Disk Backup

• Only disks in the Available or In-use state can be backed up.
• A new disk must be at least as large as the backup's source disk.
• Cloud disk backups cannot be replicated to other regions.

Cloud Server Backup

• A maximum of 10 shared disks with a cloud server can be backed up.
• Only cloud server backups in the Available or Locked vaults can be used to create images and be replicated.
• Multiple EVS disks on a cloud server can be backed up using either crash-consistent or application-consistent backup method.
• Images cannot be created from backups if the number of resources associated with a server backup vault exceeds the quota.
• You are advised not to back up a server whose disk size exceeds 4 TB.
• Backups can be replicated only to supported regions.
  • A backup can be replicated only when it meets all of the following conditions:
    1. It is an ECS backup.
    2. It contains system disk data.
    3. It is in the Available state.
  • Only backups can be replicated. Backup replicas cannot be replicated again but can be used to create images.
  • A backup can be replicated to multiple regions but can have only one replica in each destination region. Manual replication: A backup can be manually replicated to the destination region as long as it has no replica in that region. A backup can be manually replicated again if its replica in the destination region has been deleted.
  • Only replication-supported regions can be selected as destination regions.

SFS Turbo Backup

• Only file systems in the Available state can be backed up.
• An SFS Turbo file system backup cannot be used to restore data to the original file system.
• Backups can be replicated only to supported regions.
  • A backup can be replicated only when it meets all of the following conditions:
    1. It is generated from an SFS Turbo file system.
    2. It is in the Available state.
  • Only backups can be replicated. Backup replicas cannot be replicated again but can be used to create SFS Turbo file systems.
  • A backup can be replicated to multiple regions but can have only one replica in each destination region. Manual replication: A backup can be manually replicated to the destination region as long as it has no replica in that region. A backup can be manually replicated again if its replica in the destination region has been deleted.
  • Only replication-supported regions can be selected as destination regions.

RDS Backup