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User Manual of DS-9664NI-RH Series NVR
3)
Set the hot spare type of the selected HDD to Global Hot Spare or the specified hot spare for the
existing array.
Global hot spare: it can be used as the hot spare for any array created in the system.
Specified hot spare: it can be used as the hot spare for the specified array only.
4)
Click the OK button to finish the settings.
When the system has detected HDD exception or the array is in Degraded status, the auto-rebuild
task will be automatically started.
10.2 Rebuilding an Array
Purpose:
The array rebuilding function is used for rescuing the data from the unstable or failure physical disk existed in
the array, aiming to protect data and recover the completeness of the array.
The working status of array includes Functional, Degraded 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 Degraded.
When the array 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.
Steps:
1.
Enter the Array Settings interface. The status of the array is Disk Loss. Since the hot spare disk is
configured, it will be automatically used for array rebuilding.
Figure 10.16 Set Hot Spare
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