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Configuring Your Server 4-27
depending on firmware.
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To change settings of Patrol Read, use Universal RAID Utility.
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If the system is restarted while running Patrol Read, Patrol Read resumes from that point.
Consistency Check
The Consistency Check is used to check consistency among virtual drives. It is available for redundant virtual drives except for
RAID0. It is also available for host spare.
Consistency Check can be performed through WebBIOS or Universal RAID Utility.
Consistency Check performs not only consistency check but also repair of error sectors. Accordingly, it can be used as
preventive maintenance.
IMPORTANT: Note the following for Consistency Check:
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During Consistency Check, the processing rate is decreased due to much load.
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If the system is restarted, the Consistency Check is aborted. However, the Consistency Check
resumes after restart.
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To schedule execution of Consistency Check, use WebBIOS, not the Universal RAID Utility
Background Initialize
The Background Initialize is automatically executed when RAID5 virtual disk is created in the disk group composing of five or
more HDDs.
The Background Initialize performs the parity generation processing in the background to the area not initialized. The
processing is equivalent to that of Consistency Check.
However, the Background Initialize is not performed in the following cases.
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Full Initialize has already been executed and completed normally before executing Background Initialize.
(*) Full Initialize is a function to clear the entire area of a virtual disk with "0".
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Consistency Check has already been executed and completed normally before executing Background Initialize.
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Rebuild has already been executed and completed normally before executing Background Initialize (for RAID5
only).
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"Yes" is specified for "Disable BGI" in VD Definition.
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Virtual disk is in degraded or offline state.
Background Initialize is performed if the virtual disk of RAID6 is partially degraded.
The Background Initialize is executed again if any of the following cases occurred in the virtual disk on which the Background
Initialize has completed.
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When the virtual disk is degraded or offline, you execute Make Online to HDD being in offline status, and the virtual
disk becomes Optimal state.
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When you replace the RAID Controller with the maintenance parts and others.
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When you execute Reconstruction to existing virtual disk to make RAID5 VD with five or more HDDs.
IMPORTANT: Note the following for Background Initialize:
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During Background Initialize, the processing rate is decreased due to much load.
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Background Initialize will resume a few minutes later even if it is interrupted.