Dahua DHI-NVR5208-4KS2 User Manual page 307

 Business First: Resource priority is assigned to business operations.
Balance: Resource is evenly distributed to RAID sync and business operations.

4.13.7.2 Raid Info
You can view the existing RAID information, including type, disk space, hot spare, and status.
Select Main Menu > STORAGE > RAID > RAID Info.
The RAID Info interface is displayed. See Figure 4-225.
4.13.7.3 Hot Spare Disk
You can add a hot spare disk to a specific disk in the RAID or to the entire RAID, and the hot
spare disk is switched into operation if any disk fails.
Step 1 Select Main Menu > STORAGE > RAID > Hotspare Disk.
The Hotspare Disk interface is displayed. See Figure 4-226.
Figure 4-225
Local Basic Operation 296