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Dell PowerStore Configuring Volumes

Migrate storage resources to another appliance

Use this feature to move volumes, volume groups, or vVols to another appliance in the cluster without any disruption to host I/O.

About this task

Before removing or shutting down an appliance for service, migrate storage resources to another appliance. When you migrate a volume or volume group, all associated snapshots and thin clones also migrate with the storage resource. During the migration, additional work space is allocated on the source appliance to facilitate data movement. The amount of space that is needed depends on the number of storage objects and amount of data being migrated. This work space is released and freed up after the migration is complete.

NOTE:In this release, you can migrate volumes, volume groups, and vVols between appliances within a cluster. File-based storage resources are provisioned and managed only on the primary appliance of a cluster.

You can perform assisted migration or manual migration in PowerStore Manager:

  • Assisted migration - In the background, the system periodically monitors storage resource utilization across the appliances. Migration recommendations are generated based on factors such as drive wear, appliance capacity, and health. If you accept a migration recommendation, a migration session gets automatically created.
    NOTE:The logical size for a volume that is displayed on the Assisted Migration Recommendation screen is different than the actual size of the volume. This issue occurs because the migration recommendation accounts for the migration space of the volume family, which may, if applicable, include clones and snapshots.
  • Manual migration - You can choose the storage resources to migrate to another appliance in the cluster.

To manually migrate a volume or volume group to another appliance in your cluster:

NOTE:To manually migrate a vVol, see Migrate Virtual Volumes to another appliance.


  1. Under Storage, select Volumes or Volume Groups.
  2. Select the storage resource that you want to migrate.
  3. Under More Actions, select Migrate.
    The Migrate slide-out panel is displayed.
  4. Select an appliance that best meets the requirements for the storage resource that you are migrating.
  5. Select Next.
    A migration session with a status of Pending is created in the background.
  6. Select Finish.
    The migration session is displayed on the Migration Actions page, and then the Required Action for Migration slide-out panel is displayed.
    NOTE:If applicable, rescan the associated host adapters for the associated hosts to ensure that the storage is accessible when the migration is complete.
  7. Select Start Migration.
    If a Rescan Host dialog box displayed, select the Yes, the associated hosts have been rescanned check box and select Start Migration if you have rescanned the associated hosts. If you have not rescanned the associated hosts, rescan them before continuing the migration.
    A Data Migration dialog box is displayed.
  8. To start the migration, select Migrate Now.
    You can monitor the migration session by selecting the Migrations tab on the Internal Migrations page.
    NOTE: Depending on the amount of data getting migrated, it may take several minutes, hours, or days to complete the migration. It may also have an impact on the overall system performance.

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