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arcserve-KB : How the VSS Backup Works.

Last Update: 2015-12-15 22:03:29 UTC

How the VSS Backup Works.

The steps involved in using CA ARCserve Backup to perform a VSS backup are:

1. The Requestor (CA ARCserve Backup) asks VSS to tell the Writers involved in the backup to gather their writer metadata documents (XML files that contain instructions for the backup) and send them to the Requestor.

CA ARCserve Backup communicates directly with VSS in local configurations. In remote configurations, the communication between VSS and CA ARCserve Backup is handled by the Client Agent for Windows, which must be installed on the target computer.

2. VSS contacts the Provider responsible for managing the volumes involved in creating the shadow copy. In the simplest case, one Provider is responsible for all of the volumes involved in creating the shadow copy, but in some situations, multiple Providers may be involved.

3. VSS contacts the Writers that are part of the backup and asks them to gather their writer metadata documents and send them to the Requestor. The Writers also begin preparing for the freeze by ensuring that the files to be backed up are in a consistent state.

4. The Writers send their writer metadata documents to the Requestor. Do not edit these files directly. Use the Backup Manager in CA ARCserve Backup to indicate the files you want to back up, and the backup and restore methods to use.

5. After collecting all the writer metadata documents from the Writers, the Requestor issues another command to VSS, asking it to begin the creation of the shadow copy.

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