Constraints

General

• A vault can be associated with only one backup policy.
• A vault can be associated with a maximum of 256 resources.
• A maximum of 32 backup 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.
• 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.
• Concurrent data restoration is not supported.
• Auto capacity expansion does not take effect if it is enabled after the vault is full.

Cloud Disk Backup

• Only disks in the Available or In-use state can be backed up.
• Frozen disks in the retention period cannot be backed up.
• A new disk must be at least as large as the backup's source disk.
• Backup and restoration of local disks are not supported.

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.
• Frozen servers in the retention period cannot be backed up.
• Multiple EVS disks on a cloud server can be backed up using either crash-consistent or application-consistent backup method.
• You can back up specific disks on a server, but such a backup must be restored as a whole. File- or directory-level restoration is not supported.
• 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.

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.

RDS Backup