Hitachi HF-W2000 30, User Manual

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10. SOFTWARE RAID1
10-31
10.6.5 Consistency check function
A consistency check reads all the areas of the HDDs on both the drive bay 1 and 2 and
checks for error areas. If read fails on some areas, data is copied from the other HDD to
those areas to restore the data. A consistency check does not compare the data of an area
between the two HDDs if the area does not have any errors.
If you periodically runs a consistency check, you can reduce the possibility of rebuild
failure when the system recovers from fall-back operation.
This function can be used only when the status of the software RAID1 is normal (that is,
Array Status on the status display for RAID1 is “OPTIMAL” or “OPTIMAL (MEDIA
ERROR)”).
The following shows how to use this function.
1. On the menu screen, enter “3” and then press the [Enter] key.
Select Function :
1:Status
2:Rebuild
3:Consistency Check
4:Prepare For Restore
5:Quit
Please select No.= 3 (Enter)
2. A message is displayed for confirmation of starting a consistency check.
Please select No.= 3
Are you sure you select Consistency Check? (yes, no) :
If you start a consistency check, enter “yes”. If you enter “no”, the menu screen will
return.
3. If you enter “yes”, a consistency check starts and the progress is indicated in %.
When the consistency check is complete, a message to indicate completion is displayed
and the menu screen will return.
>>Start Consistency Check (Press `Ctrl+C' to abort) 01/31/2012 12:40:00
100%
>>End 01/31/2012 13:31:00
If you abort a consistency check in the middle, enter Ctrl+C.
If an error message is displayed while selecting options or running a consistency check,
see Subsection 10.6.7, “Error Message” and take a corrective action based on the error
message.