AMCC 3ware 9000 Series, User Manual

Page: 131 / 202

Scheduling Background Tasks
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To change the background task rate
1 Choose Management > Controller Settings from the menu bar.
2 In the Background Task Rate section of the Controller Settings Page,
select one of the five radio buttons to indicate the relative task rate for
Rebuild and Verify Tasks.
The furthest left buttons set the firmware to the fastest rebuild and verify
settings. This means that maximum processing time will be given to
rebuilds or verifies rather than I/O. The furthest right buttons set the
firmware to the slowest rebuild and verify settings, giving maximum
processing time to I/O.
After you select one of the radio buttons, the page refreshes, and a
message at the top confirms the change you have made.
For more information about these settings, see the reference section,
“Controller Settings Page” on page 53.
Scheduling Background Tasks
You can set up scheduling windows for when background tasks can occur, so
that routine maintenance of storage media occurs at times that will be least
likely to interfere with peak I/O times. By creating and using schedules, you
can limit active rebuilding, verifying, and testing of units to times that are
least disruptive.
Note:
Initialization and migration operations follow the rebuild schedule.
Although rebuild/migrate, verify, and self-test tasks are scheduled separately,
you set up the schedules for each in a similar way. You can perform the
following scheduling 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
Tip: If you want to change a scheduled task, you first remove the scheduled
item and then add it back with the desired day, time, and duration.
Sometimes you may want to manually start rebuild and verify tasks. For
information about how to do so, see the procedures under “Rebuilding Units”
on page 130 and “Verifying Units” on page 135.