Adding a local WFS/HNAS data migration path

Data Migrator Administration Guide for Hitachi NAS Platform

Part Number

You can add a data migration path in the NAS Manager.

  1. Navigate to Home > Storage Management > Data Migration Paths.
  2. Click Add WFS/HNAS Path.

    The following table describes the fields on this page:

    Section Item/Field Description
    Primary EVS/File System The EVS and file system of the primary storage. This defines the source of the data migration path. To change the currently selected EVS and file system, click change....
    Virtual Volume By default, data migration policies include the entire file system. To configure migrations on a per virtual volume basis, fill this check box and select the virtual volume to be used as the primary storage for this data migration path.
    Secondary Available File systems to which the data will be migrated (the destination file system). Select the destination file system from the list. The file systems you select should be on secondary storage.
    Note: When creating a policy for testing purposes, select "None (Test Only)." Running this policy will then determine the outcome of the migration operation without actually moving data.

    In most cases you should specify a single destination file system to create a "single-target" migration path. However, if the amount of data is too large for a single target file system, you may want to nominate multiple file systems as targets to create a "multi-target" migration path.

    For "multi-target" migration paths, you should be aware of the following:
    • Data is distributed between the destination file systems based on the amount of free space available on those file systems. If the destination file system is expandable, the data distribution algorithm calculates free space not based on the file system's current size, but on the maximum size to which a file system can be expanded.

    • Once specified, multi-target paths may not be modified through NAS Manager. If you need to change the migration path targets, for instance to add an additional destination file system, you must use the migration-expand-target command through the CLI.

    Note: We can add a path for an internal migration through NAS Manager. For external migrations, use the following CLI command: migration-add-external path -s Source_File_Name -n Logic_Name -t nfs://EVS-IP_Target/Export_Name_Target.

    The file systems selected to be the destination of the migration.

  3. Select the primary file system or virtual volume whose data will be migrated to a file system in secondary storage. Ensure that both the primary and secondary data belong to the same EVS.
  4. Verify your settings, then click OK to save or cancel to decline.