3Ware 9550SXU-16ML User Guide - Page 107

About Task Schedules, About Self-tests

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3DM 2 Reference You can also enable or disable use of the schedule for the selected background tasks by selecting either Follow Schedule or Ignore Schedule. When these schedules are set to be ignored, these tasks can be performed at any time, and are not restricted to the scheduled times. Note: Scheduling of these tasks is only available on the 9000series controllers. For details about the different background tasks, see "About Background Tasks" on page 169. About Task Schedules Each type of task may be scheduled for up to 7 times per week. This limits active initializing, rebuilding, verifying, migrating, and testing of a unit to the times you specify, so that the task does not interfere with peak I/O times. If all 7 schedule slots are filled, you must first remove one or more schedule times before you can add another. You may set schedule times whether scheduling is set to be followed or ignored. This is useful if you want to temporarily disable the schedule. If you remove all the schedule times for a particular background task, initializations, rebuilds, and migrations will run anytime, as they are needed. Verify will only run if started by the CLI, if the Verify Unit button is clicked, or if Auto-Verify is selected for that unit. For information about adding and removing schedules, and setting schedules to be followed or ignored, see "Scheduling Background Tasks" on page 176 About Self-tests Unlike scheduling of rebuilds and verifies, scheduling of self-tests is always followed. To disable self-tests you either remove all schedule times, or uncheck the tests listed in the Tasks column. Note: Only the checked tasks will be run during the scheduled times. If none of the tasks are checked, self-tests will never run, even if you have scheduled time slots set. Two self-tests can be scheduled: Upgrade UDMA mode. This test checks the speed at which data transfer to drives is occurring, to see if the UDMA mode can be increased. (If you are already running at the fastest UDMA mode, then this self-test has no effect.) The UDMA mode can become downgraded in the event that cable CRC errors are encountered, requiring multiple retries to read sectors. In severe cases, the www.3ware.com 97

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3DM 2 Reference
www.3ware.com
97
You can also enable or disable use of the schedule for the selected background
tasks by selecting either
Follow Schedule
or
Ignore Schedule
. When these
schedules are set to be ignored, these tasks can be performed at any time, and
are not restricted to the scheduled times.
Note:
Scheduling of these tasks is only available on the 9000-
series controllers.
For details about the different background tasks, see “About Background
Tasks” on page 169.
About Task Schedules
Each type of task may be scheduled for up to 7 times per week. This limits
active initializing, rebuilding, verifying, migrating, and testing of a unit to the
times you specify, so that the task does not interfere with peak I/O times.
If all 7 schedule slots are filled, you must first remove one or more schedule
times before you can add another.
You may set schedule times whether scheduling is set to be followed or
ignored. This is useful if you want to temporarily disable the schedule.
If you remove all the schedule times for a particular background task,
initializations, rebuilds, and migrations will run anytime, as they are needed.
Verify will only run if started by the CLI, if the Verify Unit button is clicked,
or if Auto-Verify is selected for that unit.
For information about adding and removing schedules, and setting schedules
to be followed or ignored, see “Scheduling Background Tasks” on page 176
About Self-tests
Unlike scheduling of rebuilds and verifies, scheduling of self-tests is always
followed. To disable self-tests you either remove all schedule times, or
uncheck the tests listed in the Tasks column.
Note:
Only the checked tasks will be run during the scheduled
times. If none of the tasks are checked, self-tests will never run,
even if you have scheduled time slots set.
Two self-tests can be scheduled:
Upgrade UDMA mode.
This test checks the speed at which data transfer to
drives is occurring, to see if the UDMA mode can be increased. (If you are
already running at the fastest UDMA mode, then this self-test has no effect.)
The UDMA mode can become downgraded in the event that cable CRC errors
are encountered, requiring multiple retries to read sectors. In severe cases, the