User guide

Background Tasks
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and cancel a rebuild by using the Remove Drive link on the Maintenance
page.
If you do not have hot-swap carriers and do not want to boot the operating
system and launch 3DM, you can also cancel a rebuild by powering down the
system, physically removing a drive, and installing another one that you want
to use. Then when you start 3BM, the unit will appear as degraded and you
can rebuild it, using the steps described under “Rebuilding Units through
3BM” on page 152.
Setting Background Task Rate
In 3DM, you can set the relative performance of background tasks
(initializing, rebuilding/migrating, and verifying) in relation to normal I/O
activity (reading and writing to disk).
Controllers can have separate settings for Rebuild/Migrate Rate and Verify
Rate. (Initialization occurs at the Rebuild rate.)
To change the background task rate
1 Choose
Management > Controller Settings from the menu bar.
2In 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.
Note: If you want to pause the rebuild process through 3DM, you can do so by
setting or changing the rebuild schedule on the Scheduling page. If you set a
schedule for rebuilds that does not include the current time, the rebuild process will
pause.