Migration process management
You can initiate volume migrations and pause, resume, or cancel a migration process that is in progress.
|Is migration allowed with Easy Tier?
|Indeterminate data loss
Initiating volume migration
With Easy Tier, you can migrate volumes from one extent pool to another. The time to complete the migration process might vary, depending on what I/O operations are occurring on your storage unit.
If an error is detected during the migration process, the storage facility image (SFI) attempts the extent migration again after a short time. If an extent cannot be successfully migrated, the migration is stopped, and the configuration state of the logical volume is set to migration error.
Pausing and resuming migration
You can pause volumes that are being migrated. You can also resume the migration process on the volumes that were paused.
You can cancel the migration of logical volumes that are being migrated. The volume migration process pre-allocates all extents for the logical volume when you initiate a volume migration. All pre-allocated extents on the logical volume that are not migrated are released when you cancel a volume migration. The state of the logical volumes changes to migration-canceled and the target extent pool that you specify on a subsequent volume migration is limited to either the source extent pool or target extent pool of the original volume migration.