Background tasks are maintenance tasks that help maintain the integrity of your drives and data. These tasks include

3ware RAID management software includes some controls to help you balance completion of these tasks with host I/O responsiveness, so as to minimize any conflict between the two. For example, you can schedule when backgrounds tasks should be run (to avoid peak work hours) and you can specify the rate at which they run in relationship to foreground I/O tasks. You can also set the background task mode to address the issue of latency.

Although the migration of a unit is handled as a background task, initiating it is similar to creating a new unit. For details, see Changing An Existing Configuration by Migrating.