Local Storage Tool
The Local Storage Tool must be enabled by your service provider from the DS-System to allow the DS-Client to save backup data to a local disk or UNC path.
If a restore is required, the file can be quickly restored at LAN speed from the local environment without connecting through the IP WAN to DS-System.
NOTE: Local storage does not apply during the initial backup process. Any backups configured for local storage will ignore the setting until the initial backup is transferred to the DS-System online storage.
When a file in a backup configured with local storage is created or modified, the backup process sends it to both DS-System and the local storage. If a file was previously backed up on DS-System, but there is no copy of the file on the local storage (for example, it was backed up before the backup was marked for local storage), the backup process sends it only to local storage. If for some reason the file cannot be saved locally, it is still sent to the DS-System and an error is logged.
Local storage behaves differently for backups assigned to a retention rule:
• Without Retention — Local storage keeps a copy of the latest generation of the backup files (as well as online, offsite at the DS-System).
• With Retention — The same number of generations are backed up to local storage as are on DS-System. Ensure there is enough space in the Local Storage, and perform the “Enforce Retention” process regularly. For more information, see
“Using premium backup and recovery services”.
NOTE: In both cases, when a new backup session occurs and an existing generation of a file is replaced by a new one, the old generation of the file is deleted after the new one is saved on the local storage. This means there must be enough free space on the local storage to accommodate both generations.
By default, DS-Client tries to restore from local storage first. For missing files or older generations, DS-Client retrieves them from DS-System online storage.
The local storage cache is an option that you can configure for a backup to define a disk location for the temporary storage of backup data if the connection to DS-System is lost while a backup is in progress and all configured retries fail. Once DS-Client reestablishes the connection, it sends the data in the local storage cache to the DS-System.
When sending data to the local storage cache, DS-Client processes the data from the source and saves the data as a full backup in a compressed and encrypted format on the local storage cache. If the connection from DS-Client to the DS-System is maintained throughout the entire backup activity, the local storage cache is not used.
IMPORTANT: By default, the local storage cache location is the same as the local storage path. Whatever path you select, ensure it has sufficient capacity to store the backup data. When used, the local storage cache supports the total amount of data that needs to be master processed and backed up in a compressed and encrypted format for a backup.