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3ware Disk Manager (3DM 2)
62 3ware 9000 Series Serial ATA RAID Controller User Guide
If the unit you selected to verify is a redundant unit, the redundancy of the unit
will be verified. For example it will check parity for a RAID 5 or check data
consistency for a RAID 1. If the unit you checked is not a redundant unit,
verify will do a surface scan of the media. During verification, I/O continues
normally. For RAID 0, single disks, JBODs, and spares, there is only a slight
performance loss. For redundant units, you can set the background task rate
on the Controller Settings page to specify whether more processing time
should be given to verifying or to I/O.
While a unit is verifying, the status changes to Verifying and a Stop Verify
link appears in the right-most column of the Unit Maintenance table.
Note: If the unit has not previously been initialized and you click
Verify Unit, the initialization process starts. Initialization cannot
be halted, so no Stop Verify link appears. (Initialization can be
paused, however, through Scheduling. Initialization follows the
Rebuild schedule, so turning on scheduling for Rebuild will pause
initialization, as well.) For more information about initialization,
see “About Initialization” on page 109.
Rebuild Unit. Replaces a degraded drive in a degraded unit with an available
drive and begins rebuilding the RAID. When you select a degraded unit and
click Rebuild Unit, a dialog box listing available drives appears, so that you
can select the drive you want to use. If the degraded unit has more than one
degraded drives (for example, a RAID 10 where both mirrored pairs each
have a degraded drive), you will repeat this process a second time.
If rebuild scheduling is enabled on the Scheduling page, the unit will not start
actively rebuilding until the scheduled time, and the status will change to say
“Rebuild-Paused.” (The Unit Details page indicates whether a unit is actively
rebuilding.) If rebuild scheduling is not enabled, the rebuild process will
begin right away.
Remove Unit. Removes a selected unit and allows you to unplug the drives
and move the unit to another controller. the data on the unit remain intact.