AMCC 3WARE 720-0138-00 - Manual (Page 76)

Chapter 6. Maintaining Units
68 3ware Serial ATA RAID Controller User Guide for the Power Mac G5
Background Tasks
Background tasks are maintenance tasks that help maintain the integrity of
your drives and data. These tasks include
• Initialization of units
• Verification of units
• Rebuilds when units have become degraded
• Migration of an on-line RAID from one RAID configuration to another
• Self-tests
You can set up your system so that these tasks occur as they are needed, or
you can create schedules so that they occur during non-peak times.
Background tasks can have an effect on performance, so using a schedule can
minimize the impact.
This section includes the following topics related to background tasks:
• About Initialization
• About Verification
• Starting a Verify Manually
• Rebuilding Units
• Cancelling a Rebuild and Restarting It with a Different Drive
• Setting Background Task Rate
• Background Task Prioritization
• Scheduling Background Tasks
• Viewing Current Task Schedules
• Turning On or Off Use of a Task Schedule
• Removing a Task Schedule
• Adding a New Task Schedule Slot
• Selecting Self-tests to be Performed
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” on page 50.