User Manual of Digital Video Recorder 
 
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10.2 Rebuilding Array 
Purpose: 
The working status of array includes Functional, Disk Loss and Offline. By viewing the array status, you can take 
immediate and proper maintenance for the disks so as to ensure the high security and reliability of the data stored 
in the disk array. 
When there is no disk loss in the array, the working status of array will change to Functional; when the number of 
lost disks has exceeded the limit, the working status of array will change to Offline; in other conditions, the 
working status is Disk Loss. 
When the virtual disk is in Degraded status, you can restore it to Functional by array rebuilding. 
10.2.1 Automatically Rebuilding Array 
Purpose: 
When the virtual disk is in Degraded status, the device can start rebuilding the array automatically with the hot 
spare disk to ensure the high security and reliability of the data. 
Before you start: 
The hot spare disk needs to be configured. 
Steps: 
1.  Enter the Array Settings interface. When the status of the array is Disk Loss, the hot spare disk will be 
automatically used for array rebuilding. 
Menu > HDD > RAID > Array 
 
Figure 10. 15 Array Settings Interface 
 
2.  Enter the Virtual Disk interface to view the rebuilding status of the virtual disk. 
Menu>HDD>RAID>Virtual Disk 
 
Figure 10. 16 Virtual Disk Settings Interface 
 
 
If there is no hot spare disk after rebuilding, it is recommended to install a HDD into the device and set is as a hot 
spare disk to ensure the high security and reliability of the array.