Back up before migration

You must back up your migrated files to guard against data loss. Use a management class to specify whether your files are backed up before you migrate them.

If you back up and migrate files to the same server

Before a file is migrated, the space management client can check if a backup copy exists. Some management classes, including the default management class, require a backup copy before a file can be migrated. With the default management class, if a backup copy does not exist, the file is not migrated.

If you back up files to one server and migrate files to a different server

The space management client cannot verify that current backup versions of your files exist before you migrate files. Any management class that you assign to files must specify that current backup versions are not required before migration. Otherwise, you cannot migrate your files.

To back up your files after you migrate them, assign a management class to your files that does not include the requirement for an existing backup version. If you back up files to the same server to which you migrated them, files are copied from the migration destination to the backup destination. Files are not recalled to your local file system.