Dahua HDCVI Série Manuel De L'utilisateur page 388

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Appendix G-3 RAID Capacity Calculation
RAID Name
Total Space of the N disks.
RAID0
The total amount of N*HDD=HDD space *HDD amount.
RAID1
Min(capacityN)
RAID5
(N-1) × min(capacityN)
RAID10
(N/2) × min(capacityN)
Note
capacityN refers to the disk of mini space among all the member HDDs.
Appendix G-4 RAID Usage Suggestions
!
For the environment of high HDD read-write speed and no security requirements, you can
use RAID0. Please note RAID0 is the most vulnerable level and has no redundant function.
System loses all data once any HDD becomes malfunction.
!
For the environment of high security level and no HDD read-write speed requirements,
please use RAID1.
!
For the environment of high security level and HDD read-write speed at the same time,
please use RAIOD5.
!
Always use the HDD of the same brand in case there is high HDD read-write speed
difference. For RAID1/RAID5/RAID10, the HDD shall be of the same space and of the
same model. It is to utmost exert the HDD usage rate and performance.
Manuel de l'utilisateur de l'enregistreur vidéo numérique HDCVI autonome
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