After you set up disk and tape storage pools, you can configure the server so that client data can be migrated to tape. By migrating data to tape from a disk storage pool, you can verify that tape devices are properly set up.
You can use the defaults for the migration thresholds, or you can change the threshold values to identify the maximum and minimum amount of space for a storage pool.
To control how long files must stay in a storage pool before they are eligible for migration, specify a migration delay for a storage pool.
If you decide to enable cache for disk storage pools, files can temporarily remain on disks even after migration. When you use cache, you might want to set lower migration thresholds.
To migrate from a disk storage pool to a tape storage pool, devices must be allocated and tapes must be mounted. Mount messages are directed to the console message queue and to any administrative client that is started with either the mount mode or console mode option.