Scheduling Background Tasks

You can set up scheduling windows for when background tasks occur so that routine maintenance of storage media occurs when it will be least likely to interfere with day-to-day work on the system (peak I/O times). By creating and using schedules, you can specify when active rebuilding, migrating, verifying, and testing of units should occur. For example, you might wish these tasks to occur at 2 AM each day, or on weekends.


	Note: Initialization follows the rebuild/migrate schedule. The default setting for both is to ignore the schedule.

Rebuild/migrate, verify, and self-test tasks are scheduled separately, but in a very similar way. You can perform the following scheduling tasks:

Viewing Current Task Schedules

Turning On or Off Use of a Rebuild/Migrate Task Schedule

Selecting Advanced or Basic Verify Schedules

Removing a Task Slot from a Schedule

Adding a New Task Schedule Slot

Selecting Self-tests to be Performed


	Tip: If you want to change a task schedule window, you first remove the schedule item and then add it back with the desired day, time, and duration.


	Note: Setting up the scheduling window does not actually request background tasks. It simply specifies when they can run. For more information about the background tasks themselves, see Background Tasks.

You can also set the rate at which background tasks are performed compared to I/O tasks. For more information, see Setting Background Task Rate.

Scheduled Task Duration

If a rebuild does not complete in a scheduled time block, it will pause and continue where it left off at the next scheduled time block.

This is also true for verify, if you use the Advanced Verify schedule. If you use the Basic Verify Schedule, verifies will run to completion, and are not limited to a specific duration.


	Note: When using Basic Verify Schedule and Auto-Verify, if the system is off at the scheduled time, a Verify will start when the system is powered on, if it has been longer than a week since a verify last completed.

Related Topics: Background Tasks; Viewing Current Task Schedules; Turning On or Off Use of a Rebuild/Migrate Task Schedule; Removing a Task Slot from a Schedule; Adding a New Task Schedule Slot; Background Task Prioritization