File Recall

When a user or application accesses a migrated file to read, write, or change attributes, Backup automatically recalls the file to the location of the stub file. After the recall starts, the file begins to open. The recall operation finishes before control return to the user program. Therefore, the user might notice a delay in reading and writing until the file is completely recalled to its original position. Other than a slower access time, however, the entire recall process is transparent to the user. Access time depends on the availability of the migration media, device speed, and network speed.

If the local hard disk has insufficient free space to recall the file, Backup issues the appropriate notifications. Backup provides preconfigured HSM notifications. See "Event Notification" for details on using notifications.