RAID Recommendation for Redundancy

[vincent1979]

Hi colleagues,
For a project requiring higher data protection, I’m configuring RAID on a Hikvision NVR.
Would RAID 5 be sufficient, or is RAID 6 recommended for improved fault tolerance in surveillance environments?

 

[whzone]

Dear member,
As a general guidance:
RAID 5
1 disk fault tolerance
Good balance of storage and redundancy

RAID 6
2 disk fault tolerance
Recommended for larger arrays or critical installations
For evidential-grade systems, RAID 6 is typically preferred.

RAID 5

• Minimum HDDs required: 3
• Provides 1 disk fault tolerance
• Offers a good balance between usable storage capacity and redundancy
• Suitable for small to medium-sized installations where moderate fault tolerance is acceptable

Usable capacity formula:
(Total number of drives − 1) × Drive size
Example:
4 × 10TB drives → 30TB usable

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RAID 6

• Minimum HDDs required: 4
• Provides 2 disk fault tolerance
• Recommended for larger disk arrays
• Strongly advised for critical or high-availability installations

Usable capacity formula:
(Total number of drives − 2) × Drive size

Example:
6 × 10TB drives → 40TB usable