Raid - Dahua NVR21-4KS3 Series User Manual

View HDD Information
You can view the physical position, properties, status and storage capacity of each HDD.
Configure HDD Properties
In the Properties column, you can set read and wire, read-only and redundant HDD.
When there are two or more HDDs installed on the Device, you can set one HDD as redundant disk
to back up recorded files.
Format HDD
Select an HDD, click Format, and then follow the on-screen prompts to format the HDD.
● Formatting will erase all data in the HDD, proceed with caution.
● You can select whether to erase the HDD database. If the HDD database is erased, the AI search
data and the uploaded audio files will be deleted.

5.12.3 RAID

RAID (redundant array of independent disks) is a data storage virtualization technology that
combines multiple physical HDD components into a single logical unit for the purposes of data
redundancy, performance improvement, or both.
Figure 5-243 Disk manager
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User's Manual