3.8 Redundancy Check

Routine redundancy check allows consistencies to be detected, checked and repaired to prevent rebuild from failing at occurrence of a fault in an HDD. This is possible for logical drives of RAID level 1, 10 or 5. The redundancy check can also repair bad sectors detected during inconsistency check. To keep a RAID system operating stably, it is highly recommended to provide routine redundancy check by using the scheduling feature.

The redundancy check is executable however system load may be and thus can be used in a system environment where accessing to HDDs occurs frequently to always apply high load to them.

IMPORTANT:

„Redundancy check for a logical drive not full- initialized or not subject to redundancy check in the Auto Fix mode at all is forcibly set to the Auto Fix mode.

„Note that load is applied to the system to decrease its processing rate during redundancy check.

To provide a logical drive with redundancy check, follow the procedure below.

1.Click the subsystem (ST EX4650EL) icon in the Tree View.

2.Click the downward arrow at the right end of the Background Activities tab in the Management Window and then click Start Redundancy Check.

3.Make settings required for the redundancy check.

Redundant Logical

Select a logical drive to be subject to redundancy check from the

Drive

pull-down menu.

 

 

AutoFix

Set processing to be done when an inconsistency error is

 

detected.

 

If Auto Fix is checked, data in other HDDs configuring RAID is

 

repaired at detection of an inconsistency error.

 

If Auto Fix is not checked, any inconsistency error detected is not

 

repaired.

Pause On Error

Set whether the processing is paused when an inconsistency error

 

is detected.

 

If Pause On Error is checked, processing is paused at detection of

 

an inconsistency error. However, if Auto Fix is also checked,

 

processing is paused only when the error cannot be repaired.

 

If Pause On Error is not checked, the processing is not paused in

 

spite of detection of an inconsistency error.

4. Click [Submit].

The redundancy check is started.

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