How to handle RAID status "Critical"?

[Description]

How to handle RAID status "Critical"?

[Root Cause]

The RAID status shows "Critical" because a faulty HDD is detected in the RAID volume. When the RAID status is "critical", there is no fault tolerance in this volume anymore though it is still recording. Once another HDD becomes faulty, recording will be stopped and all data in this RAID volume will be lost. 

For example, if there is 1 faulty HDD in a RAID 5 volume, the RAID status will show "Critical".

When "Critical" is shown on the status, please replace the faulty HDD immediately.

[Solution]

Step 1: Open Internet Explorer, Windows Chrome or Mac Safari and login to the NVR web page.

Step 2: Click RAID & File System / RAID Management then click the Modify tab.

Step 3: Click on the volume you want to modify. The information of this volume will be displayed under the Modify Volume section

Step 4: Remove the faulty HDD:
Select the HDD to be removed. Click "Modify" button.

Check "Yes, I want to modify this volume box", and click "Yes, modify it" button.

Step 5: Remove the faulty HDD from the NVR. Insert a new HDD.

Step 6: Go to Modify Volume again, select "Add Disk", and click the Modify button. 

Check "Yes, I want to modify this volume box", and click "Yes, modify it" button.

Step 7: The modifying process takes a few hours, depending on the size of disks. Recording won’t stop during the modification, and the video footage of this RAID volume is fully accessible.

Note: This function is designed for replacing a broken hard drive with a new one, instead of modifying RAID level.
NOTE: In the condition of RAID status "critical", it warns the users that one of disks of this RAID volume is faulty. Even though it’s still recording, there is no fault tolerance, and it is highly suggested to replace the faulty HDD.

 

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